1. plural of headspace; the space inside the chamber of a firearm between the bolt face and the base of a cartridge when fully seated
Usage: technical; firearms
2. plural of headspace; a person's mental state, mood, or psychological condition
Usage: informal

Examples

• The gunsmith measured the headspaces of the rifles to ensure proper ammunition fit.
• Different headspaces among team members made collaboration challenging.
• She needed to get into the right headspace before the performance.
• The therapist helped clients understand their emotional headspaces.
• Proper headspaces are critical for firearm safety and accuracy.