Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
byplay is a noun meaning "incidental activity performed by an actor for dramatic effect". It carries one recorded sense.
incidental activity performed by an actor for dramatic effect
“his business with the cane was hilarious”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for byplay come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.