blocker

Noun blocker has 2 senses

• blocker(n = noun.person) - a football player whose responsibility is to block players attempting to stop an offensive play;
is a kind of football player, footballer
Derived form verb block₁₂

• blocker(n = noun.artifact) blocking agent - a class of drugs that inhibit (block) some biological process;
has particulars: alpha-adrenergic blocker, alpha-adrenergic blocking agent, alpha-blocker, alpha blocker, beta-adrenergic blocker, beta-adrenergic blocking agent, beta-blocking agent, beta blocker, labetalol, labetalol hydrochloride, normodyne, trandate, neuromuscular blocking agent
is a kind of medicament, medication, medicinal drug, medicine
Derived form verb block₆