tri-

combining form

Definition of TRI-

: three : having three elements or parts <trigraph>

: into three <trisect>

a : thrice <triweekly>

b : every third <trimonthly>

Latin (from tri-, tres) & Greek, from tri-, treis — more at three

TRI- Defined for Kids

prefix

: three <triangle>

Next Word in the Dictionary: triablePrevious Word in the Dictionary: trfrAll Words Near: tri-

What made you want to look up tri-? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears