American Dictionary

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Definition stiffen in American English

stiffen verb

verb
/ˈstɪf(ə)n/
1

to suddenly hold your body in a stiff way, often because you become nervous, worried, angry, or unfriendly

Example

She stiffened as the footsteps came closer and closer.

Example

He stiffened with rage.

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2

if your resolve or resistance stiffens, or if you stiffen it, you become more determined

Example

The army stiffened their resistance.

Example

The air attack only served to stiffen the enemy's resolve.

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3

to become stiff and difficult to move

Example

Her old fingers were stiffening up now.

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3.1

to make something stiff

Example

He sat up straight, stiffening his back.

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Definition stiffen in American English