From Longman Dictionary of Contemporary Englishholsterhol‧ster /ˈhəʊlstə $ ˈhoʊlstər/ noun [countable] PMWa leather object for carrying a small gun, that is worn on a belt
Examples from the Corpus
holster• She wears a short black skirt and a holster on her belt.• During the confusion of this last day at sea, he came to our quarters and handed me the finished holster.• He pulled himself into the saddle, settled his sore thighs, and pushed the rifle into its holster.• Sharpe tied the horse's reins to the harrow's stout frame, then slid his rifle out of its saddle holster.• The leather ring on my left shoulder had the holster sewn on near the bottom.• I put the gun back in the holster and looked at my watch.• I slipped the heavy derringer into the holster while the mate watched proudly.• There was a belt around his waist with holster attached.Origin holster (1600-1700) Dutch 