Meaning of “tighten” in the English Dictionary

"tighten" in English

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tightenverb [ I or T ]

uk /ˈtaɪ.tən/ us /ˈtaɪ.tən/

B2 to become tighter or to make something become tighter, firmer, or less easy to move:

Tighten the straps so they don't rub.
As he struggled, the ropes tightened even more.

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(Definition of “tighten” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"tighten" in American English

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us /ˈtɑɪt·ən/

tighten verb (CONTROL)

[ T ] to strongly control something:

Security was tightened at US embassies around the world.
The government moved to tighten the rules on toxic substances in the air.
[ M ] Our team will have to tighten up its defense if we want to win.

tighten verb (LIMIT)

[ T ] to make something less easily available:

The government plans to tighten credit and slow the growth of the money supply.

tighten verb (MAKE FIRMER)

[ I/T ] to make something tighter, firmer, or less easy to move:

[ T ] You’ve got to tighten the laces of your ice skates.
[ I ] His arms tightened around her.

(Definition of “tighten” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"tighten" in Business English

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tightenverb [ I or T ]

uk /ˈtaɪtən/ us

also tighten up GOVERNMENT, LAW to make a rule, system, or law stronger and more difficult to ignore:

tighten controls/rules/regulation There were renewed calls to tighten controls on imported products.

ECONOMICS, FINANCE limiting the amount of money that people and companies are able to borrow or spend, for example, by increasing interest rates:

Central banks were expected to respond by tightening monetary policy.

ECONOMICS, COMMERCE if a market tightens, there becomes less of something available than is wanted or needed:

The global market for nurses is tightening.
tighten your belt

to spend less money than usual for a period of time because you do not have as much money:

The major supermarkets have started a price war as customers tighten their belts.

Phrasal verb(s)

(Definition of “tighten” from the Cambridge Business English Dictionary © Cambridge University Press)