1 B1 neutral
To make something physically more secure or firm by tightening it.
"The mechanic tightened up the loose screws on the bicycle frame."
separable
tighten up
B2 neutral separable transitive/intransitive
To make something physically tighter, or to make rules, security, or performance stricter and more effective.
In plain English
To make something more tight or strict so it works better.
What does "tighten up" mean?
3 meanings, ordered from most common to least. Color-coded by CEFR level.
2 B2 idiomatic neutral
To make rules, controls, or security measures stricter.
"The government plans to tighten up immigration laws following the report."
“
We need to tighten up our border security.
— Common political rhetoric; widely attested in UK and US political speeches.
separable
3 B2 idiomatic neutral
To improve the quality, discipline, or efficiency of something such as a performance or a team.
"The coach told the players they needed to tighten up their defensive play."
separable
Literal vs figurative
Words literally mean
To make something tight in an upward or all-around direction.
Actually means
To make something more tight or strict so it works better.
Usage tip
Used widely in both physical contexts (tighten up a screw) and figurative ones (tighten up security, tighten up your game). Common in sports commentary, business, and politics. The intransitive use ('the security tightened up') is also natural.
Words that pair with "tighten up"
Natural word combinations native speakers use most often.
security rules regulations muscles budget defence
How to conjugate "tighten up"
The five tense forms you'll use most often.
Base
tighten up
I/you/we/they
3rd person
tightens up
he/she/it
Past simple
tightened up
yesterday
Past participle
tightened up
have + pp
-ing form
tightening up
continuous
Hear "tighten up" in the wild
Listen to native speakers using "tighten up" in real YouTube videos — click a clip to watch it on Looplines.
Keep exploring
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