hot bed noun 5verb 2forms 3 noun5 •A garden bed using such a heat-generating mass; a hotbox. •(figurative) A central point of activity, relating to a specific task. •A mass of organic matter decomposing and giving off heat from microbial metabolic action. •A bed shared by workers, sailors, or soldiers operating in shifts or watches (named for the idea that it is still warm when the next occupant gets into it). •A heated print bed, so as to help the lower levels of extruded filament stick together. verb2 •To share sleeping accommodations with one or two others serially (in shifts), as on a ship or a submarine or other operation with round-the-clock staffing.The crew of the submarine quickly got used to hot bedding. •To farm using hotbeds for season extension. formshot bedded · hot bedding · hot beds