def
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
Clipping of definitely.
Register: slang
Where it’s used:
Used
American English
Examples
i can def sneak out tn. where should i meet u?
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “def” mean?
Clipping of definitely.
Is “def” formal or informal?
def is generally slang.