Entry 3 senses · 3 variants Webster, 1913 Decuple · Dec·u·ple · IPA /dɛˈkjʊp(ə)l/ a. n. v. t. 01 a. Tenfold. 1. Tenfold.[R.] 02 n. A number ten times repeated. 1. A number ten times repeated.[R.] 03 v. t. To make tenfold; to multiply by ten. imp. & p. p. Decupled; p. pr. & vb. n. Decupling 1. To make tenfold; to multiply by ten.[R.]