overlong adjective 1adverb 1forms 2 adjective1 •Too long; overly long.O, hold me not with silence over-long! — 1591 adverb1 •Too long, for an excessively long time.[…] his wandering restless glance lingered over-long even on his girl cousin, so that his pretty sharp-voiced wife recalled him with a little sneer she slipped sidewise into something else she said. — 1935 formsmore overlong · most overlong