Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
self-loader is a noun meaning "a firearm that reloads itself". It carries one recorded sense.
a firearm that reloads itself
Definitions, synonyms and semantic relations for self-loader come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.