call waiting is a noun meaning "a way of letting you know that someone else is calling when you are using your telephone". It carries one recorded sense.
a way of letting you know that someone else is calling when you are using your telephone
Definitions, synonyms and semantic relations for call waiting come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.
147,478 entries in AltF Lexicon, every one with its syllables marked.
Look up another word