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3. out of a clear blue sky

out of a clear blue sky

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out of a clear blue sky

See: out of the blue

See also: blue, clear, of, out, sky

out of a clear blue sky

Also, out of the blue. Without warning, suddenly, as in Her offer to help us with the fundraising came out of a clear blue sky, or We got a check from Aunt Ruby out of the blue. These metaphoric terms allude to something dropping unexpectedly from the sky. [Late 1800s] Also see out of nowhere.

See also: blue, clear, of, out, sky