noun

• 1American Football
  A player whose task it is to block for the ballcarrier or kicker.

  ‘Look at all of the quality running backs, blockers, and wideouts.’

  More example sentences

  • ‘He was a tremendous rusher, a great receiver, and one of the best blockers ever for a running back.’
  • ‘At any rate, they have to get a passer at some point, as well as a running back and a blocker.’
  • ‘The defensive linemen haven't consistently kept the linebackers free of blockers.’
  • ‘The defense relies heavily on the tackles to jam up blockers and give the linebackers space to make plays.’
  • ‘He is an accomplished blocker and sound player who gets to his man.’
• 2A substance that prevents or inhibits a given physiological function.

  ‘We coded all drugs according to the British National Formulary and defined secondary prevention drugs as aspirin, blockers, lipid lowering agents, or angiotensin converting enzyme inhibitors.’

  More example sentences

  • ‘The rest of the market goes to acid blockers, which prevent the action of histamine on the acid-secreting cells of the stomach, reducing acid secretion.’
  • ‘Medicines called ACE inhibitors and angiotensin-II receptor blockers are helpful.’
  • ‘This means that the supply of birth control pills, remedies for toenail fungus, cholesterol blockers and antidepressants is ample, whereas vaccines are scarce.’
  • ‘Normally even such a tiny ‘taste’ of the drug leads to cravings for more, but the blocker prevented the addiction relapse by eliminating these desires.’