Being four times as long, as big or as many of something.

Something that is four times the usual number, amount, size, etc. / (skating) A figure-skating jump with four revolutions in the air.

(transitive) To multiply by four. / (intransitive) To increase by a factor of four. / (rail transport) To provide four parallel running lines on a given stretch of railway.

plural of quadruple

simple past tense and past participle of quadruple

Third-person singular simple present indicative form of quadruple

The state of being quadruple or quadrupled.

simple past tense and past participle of quadruplicate

replicated four times

in quadruplicate: four times over, in four copies