(basketball) The achievement of a two-digit number of any three of points scored, assists, rebounds, blocks, or steals in a single game.

(finance) Simultaneous expiry on US markets of stock index futures, stock index options, and stock options, which took place on the third Friday of March, June, September, and December. (With the introduction of single stock futures those days are now quadruple witching.)

Made thrice as much; threefold; tripled.

(uncountable) The making of three identical copies of something. / (countable) Each of a set of three identical objects or copies.

(transitive) To make three identical copies of something. / (transitive) To triple.

(cricket) three hundred runs scored by a single batsman in one innings, or by two batsmen in a partnership

(obsolete) A three-legged structure; a tripod. / (Cambridge University) Any of the final examinations for a BA honours degree.

(physics, chemistry) The normal, paramagnetic state of diatomic molecular oxygen.

(mathematics) A set of three positive integers a, b and c, for which a²+b²=c²

(golf) A score of three over par (for one hole)