Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
first-string is an adjective meaning "of members of a team; not substitutes". It carries 2 recorded senses.
of members of a team; not substitutes
Definitions, synonyms and semantic relations for first-string come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.