verb

• (transitive) To put (something) down, to rest.
  "Set the tray there."
• (transitive) To attach or affix (something) to something else, or in or upon a certain place.
  "I have set my heart on running the marathon."
• (transitive) To put in a specified condition or state; to cause to be.
  "The Lord thy God will set thee on high."
• (transitive) To start (a fire).

noun

• (horticulture) A small tuber or bulb used instead of seed, particularly onion sets and potato sets.
• (engineering) A permanent change of shape caused by excessive strain, as from compression, tension, bending, twisting, etc.
  "the set of a spring"
• (piledriving) A piece placed temporarily upon the head of a pile when the latter cannot otherwise be reached by the weight, or hammer.
• (printing, dated) The width of the body of a type.

adj

• (of hair) Fixed in a certain style.

noun

• (literally and figuratively) General movement; direction; drift; tendency.
  "Here and there, amongst individuals alive to the particular evils of the age, and watching the very set of the current, there may have been even a more systematic counteraction applied to the mischief."
• (set theory) A collection of zero or more objects, possibly infinite in size, and disregarding any order or repetition of the objects which may be contained within it.
• (in plural, “sets”, mathematics, informal) Set theory.
• (dance) The initial or basic formation of dancers.