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- See:
- act
- features:
- Word Explorer
| part of speech: |
phrase |
| definition 1: |
to behave in a bad or mischievous way; misbehave.
The kids start to act up when they get bored riding in the car for a long time.- synonyms:
- carry on, fool around, misbehave
- similar words:
- goof off, rebel, transgress
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| definition 2: |
to malfunction.
This machine has been working fine, but it's acting up today for some reason.- synonyms:
- break down, malfunction
- similar words:
- break
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| definition 3: |
to happen again or return, as an illness or malfunction.
When spring comes, my allergies always act up.- synonyms:
- recur, return
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