1. people or things that block or obstruct something
2. football players whose job is to block opposing players
Usage: sports
3. medications that prevent the action of certain substances in the body
Usage: medical

Examples

• The protesters were blockers preventing traffic from moving through the intersection.
• The offensive line consists of five blockers protecting the quarterback.
• Beta blockers are commonly prescribed to treat high blood pressure.
• Parents often install ad blockers to protect their children from inappropriate content.
• The construction barriers served as effective blockers for the detour route.
• Pop-up blockers prevent annoying advertisements from appearing on websites.
• The defensive coordinator studied the opposing team’s blockers on film.