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Definition of: aboard
(ə·bôrd′, ə·bōrd′) adverb 
1. On board; into, in, or on a conveyance. 
2. Alongside; on one side. 
—all aboard Get on board or in!: a warning to passengers that their conveyance is about to start. 
—prep. 
1. On board of; upon or within, as a conveyance: aboard the train. 
2. Across or alongside of.
 
				
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