(computing, historical, informal) A basic form of computer tape that holds unjustified text, and is later processed automatically by a machine that determines where line breaks should appear in the properly formatted output.

Idea behind a business, central to the generation of revenue.

(algebraic geometry) An ideal consisting of all polynomials (belonging to a certain polynomial ring) which zero out within a given algebraic variety.

(cycling) The situation, legal in certain jurisdictions, where a cyclist treats a stop sign as a yield sign, and a red light as a stop sign.

plural of Idaho stop

plural of idiot savant

Abbreviation of Idaho.

plural of idle threat

A threat made by a person who does not mean to carry it out, and which perhaps shouldn't be taken seriously by others.

ideally; if only it were possible.