(figuratively, idiomatic) to listen for important information.

plural of opium-eater

That uses opium as a recreational drug.

A person who uses opium as a recreational drug; an opium addict.

(rail transport) The operation of a train without a conductor or guard as a cost-cutting measure; one-man operation.

Used to introduce or qualify a statement, as expressing one's own view, not one backed by external authority or to be accepted without question

(computing) synonym of comparison operator

(computing) a binary operator that tests for equality or inequality and evaluates to true or false

(programming) synonym of ternary operator

plural of opening night