Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
second-rater is a noun meaning "a person of second-rate ability or value". It carries one recorded sense.
a person of second-rate ability or value
“a team of aging second-raters”
“shone among the mediocrities who surrounded him”
Definitions, synonyms and semantic relations for second-rater come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.