A double line, especially, a queue two persons wide.

simple past tense and past participle of double down

plural of double bed

(idiomatic) Something causing someone to do a double take.

(railways) Having a pair of tracks in order to allow trains to pass in opposite directions.

plural of double-dip

Third-person singular simple present indicative form of double-dip

present participle of double-dip

plural of double crossover

(grammar) A word doubly inflected for the plural grammatical number in relation to its singular form; e.g., medium → media → medias.