| a. & adv. | 1. | (Naut.) Beyond or outside of the lines of a vessel's bulwarks or hull; in a direction from the hull or from the keel; - opposed to |
| Noun | 1. | outboard - a motorboat with an outboard motorSynonyms: outboard motorboat |
| 2. | outboard - internal-combustion engine that mounts at stern of small boatSynonyms: outboard motor | |
| Adj. | 1. | outboard - located away from the midline of a vessel or aircraft; "the outboard section of a wing"; "outboard rigging" Antonyms: inboard - located within the hull or nearest the midline of a vessel or aircraft; "the inboard flaps on the wing" |