holster /ˈhɒlstə(ɹ)/noun 2verb 1forms 3 noun2 •A case for carrying a tool, particularly a gun, safely and accessibly.Marion Wheeler took the seat, brushing the hem of her suit jacket aside to reveal a concealed holster. "You do know I carry a gun?" — 2023 •A belt with loops or slots for carrying small tools or other equipment. verb1 •To put something in a holster.Then she sorted herself out, making sure her pickaxe and shovel were properly holstered to her. — 2025 formsholstered · holstering · holsters