say it: OWT-bawrd
outboard is a noun and adjective meaning "a motorboat with an outboard motor". It carries 3 recorded senses.
a motorboat with an outboard motor
internal-combustion engine that mounts at stern of small boat
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 outboard come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.