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Meaning of mains hum | Babel Free

Noun CEFR B2

Definitions

A sound associated with alternating current which has a frequency a multiple of that of the mains electricity.

uncountable

Equivalents

Español zumbido de líneas eléctricas zumbido eléctrico

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

mains'l Mainsail mainshaft mainsheet mainshock mainsleaze