outboard

Definitions of outboard
  1. adjective
    located away from the midline of a vessel or aircraft
    “the outboard section of a wing”
    outboard rigging”
    Synonyms:
    portable
    of a motor designed to be attached to the outside of a boat's hull
    see moresee less
    Antonyms:
    inboard
    located within the hull or nearest the midline of a vessel or aircraft
  2. noun
    internal-combustion engine that mounts at stern of small boat
    synonyms: outboard motor
    see moresee less
    type of:
    ICE, internal-combustion engine
    a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine
  3. noun
    a motorboat with an outboard motor
    synonyms: outboard motorboat
    see moresee less
    type of:
    motorboat, powerboat
    a boat propelled by an internal-combustion engine
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week