in-between noun 3adjective 1in between preposition 2in between adverb 1forms 1 noun3 •An interval or intervening time. •Synonym of inbetweener (“a person who or thing that falls between different groups or characteristics”).“They don’t belong anywhere. Colored folks won’t have ‘em because they’re half white; white folks won’t have ’em cause they’re colored, so they’re just inbetweens, don’t belong anywhere.[…]” — 1960 •One who intervenes. adjective1 •Lying between; neither one thing nor the other; intermediary. in between preposition2 •Between. •In the space between. in between adverb1 •Between them. formsin-betweens