Definition of "trig"

trig¹

/tɹɪɡ/

adjective
comparative trigger, superlative triggest
1. (now chiefly dialectal) True; trusty; trustworthy; faithful.
2. (now chiefly dialectal) Safe; secure.
3. (now chiefly dialectal) Tight; firm; steady; sound; in good condition or health.
4. Neat; tidy; trim; spruce; smart.
  Quotations
  we possess of pig's skin and stirrups to keep them square and trig
  1857, J. Rarey, “The Taming of Horses”, in British Quarterly Review
  “A tight little craft,” was Austin’s invariable comment on the matron; and she looked it, always trim and trig and smooth of surface like a converted yacht cleared for action. ¶ Near her wandered her husband, orientally bland, invariably affable, […].
  1907 August, Robert W[illiam] Chambers, chapter IX, in The Younger Set, New York, N.Y.: D. Appleton & Company
  The [torture] stories seemed incongruent with the men telling them – a trim, trig lot who, given a few pounds more flesh, might have stepped right out of a recruiting poster.
  1973, Newsweek, April 16
5. (now chiefly dialectal) Active; clever.
noun
plural trigs
1. (now chiefly dialectal) A dandy; coxcomb.

trig²

/tɹɪɡ/

noun
countable and uncountable, plural trigs
1. (uncountable, informal) Trigonometry.
2. (surveying, countable, informal) A trigonometric point; a trig point.

trig³

/tɹɪɡ/

noun
plural trigs
1. (UK) A stone, block of wood, or anything else, placed under a wheel or barrel to prevent motion; a scotch; a skid.
  Quotations
  You might as well smite that saw with your fist ; you might as well put a trig under the dam and stop it, as to practise on him
  1850, Sylvester Judd, Richard Edney and the Governor's Family
2. The mark for players at skittles, etc.
verb
third-person singular simple present trigs, present participle trigging, simple past and past participle trigged
1. (transitive) To stop (a wheel, barrel, etc.) by placing something under it; to scotch; to skid.

trig⁴

/tɹɪɡ/

verb
third-person singular simple present trigs, present participle trigging, simple past and past participle trigged
1. To fill; to stuff; to cram.
  Quotations
  By how much more a mans skin is full treg'd with flesh, blood and natural Spirits.
  1660, H[enry] More, An Explanation of the Grand Mystery of Godliness; […], London: […] J[ames] Flesher, for W[illiam] Morden […]

trig⁵

/tɹɪɡ/

noun
plural trigs
1. (medicine, informal) Triglyceride.