1. a person or thing that blocks or obstructs something
2. a player whose job is to block opponents from advancing
Usage: sports
3. a substance that prevents or reduces a biological process
Usage: medical

Examples

• The fallen tree was a major blocker on the hiking trail.
• The offensive line needs better blockers to protect the quarterback.
• She took a beta blocker to help control her blood pressure.
• The school installed an ad blocker on all computers.
• Traffic cones served as blockers to redirect vehicles around the construction.
• The tight end is an excellent blocker in running plays.
• Parents can use content blockers to restrict their children’s internet access.