horse

noun

• Any of several animals related to Equus ferus caballus.
• Equipment with legs.
• Type of equipment.
• A mass of earthy matter, or rock of the same character as the wall rock, occurring in the course of a vein, as of coal or ore; hence, to take horse (said of a vein) is to divide into branches for a distance.
• The sedative, antidepressant, and anxiolytic drug morphine, chiefly when used illicitly.
• An informal variant of basketball in which players match shots made by their opponent(s), each miss adding a letter to the word "horse", with 5 misses spelling the whole word and eliminating a player, until only the winner is left. Also HORSE, H-O-R-S-E or H.O.R.S.E. (see Variations of basketball#H-O-R-S-E).
• (among students) A translation or other illegitimate aid in study or examination.
• (among students) horseplay; tomfoolery