letter opener is a noun meaning "dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books". It carries one recorded sense.
dull knife used to cut open the envelopes in which letters are mailed or to slit uncut pages of books
Definitions, synonyms and semantic relations for letter opener come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.