On a ship, train, plane or other vehicle (synset 400251347)
synonym: on board
On first or second or third base (synset 400251215)
"Their second homer with Bob Allison aboard"
Side by side (synset 400251525)
"anchored close aboard another ship"synonym: alongside
Part of a group (synset 400251433)
"Bill's been aboard for three years now"