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3. just in case

just in case

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just in case

in the event that (something happens). All right. I'll take it just in case. I'll take along some aspirin, just in case.

See also: case, just

just in case

only if something happens We keep a lot of food on hand, just in case there's a storm.

Usage notes: often used without any following clause: Make sure you have extra batteries available, just in case.

See also: case, just