1
: three : having three elements or parts
trigraph
2
: into three
trisect
3
a
: thrice
triweekly
b
: every third
trimonthly

Word History

Etymology

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

Dictionary Entries Near tri-

Cite this Entry

“Tri-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tri-. Accessed 25 Feb. 2024.

Kids Definition

tri-

combining form
1
: three : having three elements or parts
triangle
2
: into three
trisect
3
a
: three times
triweekly
b
: every third
trimonthly
Etymology

from Latin tri-, tres and Greek tri-, treis "three"

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!