Definition of 'aboard'

Adverb

1. on a ship, train, plane or other vehicle
      Synonyms: onboard
2. on first or second or third base; "Their second homer with Bob Allison aboard"
      Synonyms: on base
3. side by side; "anchored close aboard another ship"
      Synonyms: alongside
4. part of a group; "Bill's been aboard for three years now"

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