- ten times as great; tenfold.
- a tenfold quantity or multiple.
verb (used with object), dec·u·pled, dec·u·pling.
- to make ten times as great.
- (tr) to increase by ten times
- an amount ten times as large as a given reference
- increasing tenfold
1610s, from French décuple (late 15c.), from Latin decuplus “tenfold,” from decem- “ten” (see ten) + -plus (see plus).