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keep cool

Also,
keep a cool head
;
stay cool
;
be cool
;
(take it cool)
. Remain calm and under control, as in
Keep cool, they'll soon show up
, or
Be cool, the surprise is not spoiled
, or
You have to keep a cool head in these volatile situations
, or
Sit tight, take it cool, they won't bother you again
. All these terms employ
cool
in the sense of “not heated by strong emotion,” a usage dating from the late 1300s or even earlier. The first three expressions are colloquial and date from the second half of the 1800s; both of the last two are slang, and the very last
(take it cool)
is the oldest, first recorded in 1841. Also see
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Examples from the Web for keep cool
Contemporary Examples
Historical Examples
  • Leave matters to the captain; it looks as if we shall have a fight, but it is best to keep cool.

    A Waif of the Mountains Edward S. Ellis
  • Oh, that would be too long telling, Florry, and that'll keep cool.

  • "For heaven's sake, keep cool, Smithers," cried the Professor.

    The Burglars' Club Henry A. Hering
  • "That's one way to keep cool at a clambake," grinned the man in gray.

    Frank Merriwell's Cruise Burt L. Standish
  • Telling him to keep cool and call again in two hours, I sat down to my writing-desk and dashed off a poem of considerable length.

  • You might as well put the milk-can in the stream to keep cool.

  • No matter what kind of accident happens, keep your wits about you and keep cool.

    The Child's Day Woods Hutchinson
  • "Yes, keep cool, Kunnel; it's only our solicitude for your welfare," chipped in Foster.

    Prairie Folks Hamlin Garland

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