(nautical) Shouted by the ship's watch to inform the crew that land has been spotted.

(computing) An empirical observation that the density of transistors on a chip doubles every two years.

(transitive, idiomatic) to leave alone, unsupervised, without assistance.

An international organization of Arabic-speaking countries.

(of a bet, or an amount of money) Bet with another bookmaker to reduce risk. / (of an employee) Made unemployed or redundant.

(chemistry) A toxic organometallic compound, (C₂H₅)₄Pb, added to petroleum/gasoline as an antiknock agent.

(idiomatic) To tease someone; to lead someone on; to goad someone into overreacting. It usually implies teasing or goading by jokingly lying.

(idiomatic, singular only) Best of the best; something superlative; the very best.

Alternative form of a la mode

The separation of the waters of a lake etc into three layers: epilimnion, metalimnion (or thermocline) and hypolimnion.