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fast busy signal

Noun CEFR C1

Definitions

An audible signal on a voice phone line that sounds more frequently than a standard busy signal, indicating that no transmission path to the called phone number is available.

CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
See all C1 English words →

See also

fast company fast crab fast fashion fast follower fast food fast food music

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