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Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
commercial-grade is an adjective meaning "of the kind or quality used in commerce; average or inferior". It carries one recorded sense.
of the kind or quality used in commerce; average or inferior
“commercial grade of beef”
“commercial oxalic acid”
Definitions, synonyms and semantic relations for commercial-grade come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.