in case

in case

In the event that (something does or does not happen). I brought some snacks for us, in case we get stuck in traffic. Be sure to set two alarms, just in case the first one doesn't go off. I always carry a flashlight in my purse, just in case.
See also: case
Farlex Dictionary of Idioms.

in case (something happens)

in the event that something takes place. She carries an umbrella in case it rains. I have some aspirin in my office in case I get a headache. He keeps afire extinguisher in his car, just in case.
See also: case
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

in case

1. Also, just in case. If it should happen that. For example, In case he doesn't show up, we have a backup speaker. The variant also is used without a following clause to mean simply "as a precaution," as in I took an umbrella just in case. [c. 1400]
2. in case of; in the event of. If there should happen to be. For example, Here is a number to call in case of an emergency, or In the event of a power failure, we'll have to shift our plans. Similarly, in that case means "if that should happen," as in You're alone in the store? In that case I'll bring your lunch. The first usage dates from the early 1700s, the second (with event) from about 1600, and the third from the mid-1800s. Also see in any case; in no case; in the case of.
See also: case
The American Heritage® Dictionary of Idioms by Christine Ammer.

(just) in case

so as to be prepared for what may or may not happen: Somebody should stay at home in case John phones. ‘Did Clara say she’d phone?’ ‘No, but somebody should stay here just in case.’
See also: case
Farlex Partner Idioms Dictionary

in case

1. If it happens that; if.
2. As a precaution: took along an umbrella, just in case.
See also: case
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • make a case that
  • off (one's) case
  • off case
  • have a case on
  • have a case on (someone)
  • be on (one's) case
  • be on somebody's case
  • be on someone's case
  • open-and-shut case
  • an open-and-shut case
References in periodicals archive
Detained asylum seekers are not able to locate witnesses, gather evidence, or otherwise assist their attorneys in case preparation.")
Living up to America's values: reforming the U.S. detention system for asylum seekers
Offshore trusts give control to unidentified "trust protectors." The local courts can't hear claims against trusts, and many have "flee clauses" requiring trustees to transfer assets in case of law enforcement inquiries or legal writs.
Fool Me Twice
In case the execution hereof by any of the parties herein mentioned
Project update 1995: illustrative provisions of a general indemnity agreement taken in connection with contract surety bonds
As The New York Times reported, the ad opens with a shot of the border, and in case there is any misunderstanding, it has a sign saying MEXICO.
Heartbreak for Latinos
In cases where claims have been filed against entities for failing to prevent abuse, courts sometimes have found a single occurrence based on the insured's failure to perform a duty.
One occurrence, two occurrences