Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
strip-mined is an adjective meaning "mined near the earth's surface by stripping". It carries one recorded sense.
mined near the earth's surface by stripping
Definitions, synonyms and semantic relations for strip-mined come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.