a football player whose responsibility is to block players attempting to stop an offensive play
"The tight end lined up as a blocker to clear a path through the defensive line before catching his pass."
a class of drugs that inhibit (block) some biological process
"The patient was prescribed a new beta-blocker to manage his high blood pressure by inhibiting adrenaline's effects on the heart."
Agent noun of block; something that blocks something else.
"The player wore a protective blocker to shield his arm from incoming tackles."
A playing card, needed by one player, that is held by another.
"In the game of bridge, I realized my partner was holding a crucial high card that acted as a blocker to prevent me from losing too many tricks in a single suit."
In plain English: A blocker is something that stops you from doing what you want to do right now.
"The sunscreen is an excellent blocker against harmful UV rays."
Usage: A blocker refers to an agent or device used to obstruct a path or action, such as a network firewall preventing unauthorized access. In sports contexts like basketball, it specifically denotes the defensive move where one player jumps vertically to prevent another from scoring.
A surname.
"Mr. Blocker attended the family reunion as a distant relative."
The word blocker comes from the Middle English term blokker, which was formed by adding the suffix -er to the word block. It originally referred to a person or thing that blocks something, keeping its core meaning as it traveled into modern English.