| Idiom | Meaning | Example |
| keep an eye out |
watch for, look for, keep your eyes peeled
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Keep an eye out for Helen at the school reunion. You may see her.
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| keep an open mind |
be fair to all opinions, avoid prejudging
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I keep an open mind when I talk to you - open to all opinions.
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| keep fit |
exercise to be healthy, look after your body
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You'll feel better if you keep fit - if you exercise regularly.
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| keep in good shape |
care for your body, be fit, keep fit
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You keep your body in good shape. You look fit.
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| keep in line |
obey the rules, conform, stay in line
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The manager expects us to keep in line, not cause problems.
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| keep in the loop |
(See in the loop)
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| keep in touch |
phone, write a letter
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Please keep in touch with us when you move to the city.
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| keep it down |
be quiet, do not be noisy, pipe down
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Dad called to us, "Keep it down, eh. We're trying to go to sleep."
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| keep it quiet |
do not tell anyone, keep a lid on it
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I have a new job, but keep it quiet because I haven't told my boss.
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| keep it to yourself |
do not tell anyone, keep a secret
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If I tell you what she said, will you keep it to yourself?
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