What is the meaning of Blocker?

Agent noun of block (“obstruct or prevent”); something that blocks something else.

1. One who blocks or impedes the movement of an opponent.
2. A defensive or low-scoring batter.
3. One who prevents another user from contacting them electronically.
4. An application or feature that stops or impedes something.

   One who blocks or impedes the movement of an opponent.

   A defensive or low-scoring batter.

   One who prevents another user from contacting them electronically.

   An application or feature that stops or impedes something.

   A bug or issue that prevents software from being released.

   A gatekeeper who refuses the marketer access to the person they wish to contact.

   Any of various medications that block (inhibit) the activity of a chemical messenger or its receptors, such as cardiac conduction modifiers (e.g., alpha-blockers, beta-blockers), gastric acid inhibitors (H₂ histamine blockers), puberty blockers, and others.

   A close-fitting rectangular glove worn by a goalie in multiple forms of hockey.

   A blocker bet.

   A playing card, needed by one player, that is held by another.

   A person who roughly shapes a diamond.

   A person who blocks (stretches or moulds) hats.

   A resident or member of a particular block.

   Synonym of block ornament (“a cheap piece of meat of poor quality”).

   Source: wiktionary.org