I. kwä-ˈdrü-pəl, -ˈdrə-; ˈkwä-drə- verb
( qua·dru·pled ; qua·dru·pling -p(ə-)liŋ)
Etymology: Middle English (Scots), from Latin quadruplare, from quadruplus
Date: 14th century
transitive verb
: to make four times as great or as many
intransitive verb
: to become four times as great or as numerous
II. noun
Etymology: Middle English, from Anglo-French, from Latin quadruplum, from neuter of quadruplus four times as great, from quadri- + -plus multiplied by — more at -fold
Date: 15th century
: a sum four times as great as another
III. adjective
Date: 1557
1. : having four units or members
2. : being four times as great or as many
3. : marked by four beats per measure
quadruple meter
• qua·dru·ply -ˈdrü-plē, -ˈdrə-, -drə- adverb
• qua·dru·plic·i·ty ˌkwä-dru̇-ˈpli-sə-tē noun