tighten up
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
To make sufficiently tight.
Where it’s used:
Used
American English
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 2
Meaning · English
To fix something or make it correct.
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Sense 3
Meaning · English
To become tense and restrained.
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “tighten up” mean?
To make sufficiently tight.
Is “tighten up” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.