The good people at Merriam Webster wrote:
Set
Main Entry: 1set
Pronunciation: 'set
Function: verb
Inflected Form(s): set; set·ting
Etymology: Middle English setten, from Old English settan; akin to Old High German sezzen to set, Old English sittan to sit
transitive senses
1 : to cause to sit : place in or on a seat
2 a : to put (a fowl) on eggs to hatch them b : to put (eggs) for hatching under a fowl or into an incubator
3 : to place (oneself) in position to start running in a race
4 a : to place with care or deliberate purpose and with relative stability <set a ladder against the wall> <set a stone on the grave> b : TRANSPLANT 1 <set seedlings> c (1) : to make (as a trap) ready to catch prey (2) : to fix (a hook) firmly into the jaw of a fish d : to put aside (as dough containing yeast) for fermenting
5 : to direct with fixed attention <set your mind to it>
6 a : to cause to assume a specified condition, relation, or occupation <slaves were set free> <set the house on fire> b : to cause the start of <set a fire>
7 a : to appoint or assign to an office or duty b : POST, STATION
8 : to cause to assume a specified posture or position <set the door ajar>
9 a : to fix as a distinguishing imprint, sign, or appearance <the years have set their mark on him> b : AFFIX c : APPLY <set a match to kindling>
10 : to fix or decide on as a time, limit, or regulation : PRESCRIBE <set a wedding day> <set the rules for the game>
11 a : to establish as the highest level or best performance <set a record for the half mile> b : to furnish as a pattern or model <set an example of generosity> c : to allot as a task <setting lessons for the children to work upon at home -- Manchester Examiner>
12 a : to adjust (a device and especially a measuring device) to a desired position <set the alarm for 7:00> <set a thermostat at 68>; also : to adjust (as a clock) in conformity with a standard b : to restore to normal position or connection when dislocated or fractured <set a broken bone> c : to spread to the wind <set the sails>
13 a : to put in order for use <set a place for a guest> b : to make scenically ready for a performance <set the stage> c (1) : to arrange (type) for printing <set type by hand> (2) : to put into type or its equivalent (as on film) <set the first word in italic>
14 a : to put a fine edge on by grinding or honing <set a razor> b : to bend slightly the tooth points of (a saw) alternately in opposite directions c : to sink (the head of a nail) below the surface
15 : to fix in a desired position (as by heating or stretching)
16 : to arrange (hair) in a desired style by using implements (as curlers, rollers, or clips) and gels or lotions
17 a : to adorn with something affixed or infixed : STUD, DOT <clear sky set with stars> b : to fix (as a precious stone) in a border of metal : place in a setting
18 a : to hold something in regard or esteem at the rate of <sets a great deal by daily exercise> b : to place in a relative rank or category <set duty before pleasure> c : to fix at a certain amount <set bail at $500> d : VALUE, RATE <their promises were set at naught> e : to place as an estimate of worth <set a high value on life>
19 : to place in relation for comparison or balance <theory set against practice>
20 a : to direct to action b : to incite to attack or antagonism <war sets brother against brother>
21 a : to place by transporting <was set ashore on the island> b : to put in motion c : to put and fix in a direction <set our faces toward home once more> d of a dog : to point out the position of (game) by holding a fixed attitude
22 : to defeat (an opponent or a contract) in bridge
23 a : to fix firmly : make immobile : give rigid form or condition to <set her jaw in determination> b : to make unyielding or obstinate
24 : to cause to become firm or solid <set milk for cheese>
25 : to cause (as fruit) to develop
intransitive senses
1 chiefly dialect : SIT
2 : to be becoming : be suitable : FIT <the coat sets well>
3 : to cover and warm eggs to hatch them
4 a : to become lodged or fixed <the pudding set heavily on my stomach> b : to place oneself in position in preparation for an action (as running)
5 of a plant part : to undergo development usually as a result of pollination
6 a : to pass below the horizon : go down <the sun sets> b : to come to an end <this century sets with little mirth -- Thomas Fuller>
7 : to apply oneself to some activity <set to work>
8 : to have a specified direction in motion : FLOW, TEND <the wind was setting from Pine Hill to the farm -- Esther Forbes>
9 of a dog : to indicate the position of game by crouching or pointing
10 : to dance face to face with another in a square dance <set to your partner and turn>
11 a : to become solid or thickened by chemical or physical alteration <the cement sets rapidly> b of a dye or color : to become permanent c of a bone : to become whole by knitting d of metal : to acquire a permanent twist or bend from strain
Main Entry: 2set
Function: noun
1 a : the act or action of setting b : the condition of being set
2 : a number of things of the same kind that belong or are used together <an electric train set>
3 a : mental inclination, tendency, or habit : BENT <a set toward mathematics> b : a state of psychological preparedness usually of limited duration for action in response to an anticipated stimulus or situation <the influence of mental set on the effect experienced with marijuana>
4 : direction of flow <the set of the wind>
5 : form or carriage of the body or of its parts <her face took on a cynical set -- Raymond Kennedy>
6 : the manner of fitting or of being placed or suspended <in order to give the skirt a pretty set -- Mary J. Howell>
7 : amount of deflection from a straight line <set of a saw's teeth>
8 : permanent change of form (as of metal) due to repeated or excessive stress
9 : the act or result of arranging hair by curling or waving
10 also sett /'set/ a : a young plant or rooted cutting ready for transplanting b : a small bulb, corm, or tuber or a piece of tuber used for propagation <onion sets>
11 or sett : the burrow of a badger
12 : the width of the body of a piece of type
13 : an artificial setting for a scene of a theatrical or film production
14 also sett : a rectangular paving stone of sandstone or granite
15 : a division of a tennis match won by the side that wins at least six games beating the opponent by two games or by winning a tiebreaker
16 : a collection of books or periodicals forming a unit
17 : a clutch of eggs
18 : the basic formation in a country-dance or square dance
19 : a session of music (as jazz or dance music) usually followed by an intermission; also : the music played at one session
20 : a group of persons associated by common interests
21 : a collection of elements and especially mathematical ones (as numbers or points) -- called also class
22 : an apparatus of electronic components assembled so as to function as a unit <a television set>
23 : a usually offensive formation in football or basketball
24 : a group of a specific number of repetitions of a particular exercise
Main Entry: 3set
Function: adjective
Etymology: Middle English sett, from Old English gesett, past participle of settan
1 : INTENT, DETERMINED <set upon going>
2 : INTENTIONAL, PREMEDITATED <did it of set purpose>
3 : fixed by authority or appointment : PRESCRIBED, SPECIFIED <set hours of study>
4 : reluctant to change <set in their ways>
5 a : IMMOVABLE, RIGID <set frown> b : BUILT-IN <a set tub>
6 : SETTLED, PERSISTENT <set defiance>
7 : being in readiness : PREPARED <set for an early morning start>