mains hum
A sound associated with alternating current which has a frequency a multiple of that…A sound associated with alternating current which has a frequency a multiple of that of the mains electricity.
Meaning
1 senses(uncountable)A sound associated with alternating current which has a frequency a multiple of that of the mains electricity.
Translations
1 languagesLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable