re·​leas·​er | \ri-ˈlē-sər \

Definition of releaser 

: one that releases specifically : a stimulus that serves as the initiator of complex reflex behavior

Examples of releaser in a Sentence

Recent Examples on the Web

There is one very unique act here, though, a man and woman on one trapeze, the man acting as both releaser and catcher, with very complicated moves skillfully and sometimes breathtakingly executed. Mel Shields, sacbee, "'Ooo la la.' Here comes Cirque Paris. | The Sacramento Bee," 14 Apr. 2018 Early releasers also risk getting overlooked by fans who are used to searching for new tunes on Fridays. Steve Knopper, Billboard, "Why Thursday Is the New Friday for New Tunes," 10 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'releaser.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of releaser

15th century, in the meaning defined above

Keep scrolling for more

Learn More about releaser

Statistics for releaser

Look-up Popularity

Time Traveler for releaser

The first known use of releaser was in the 15th century

See more words from the same century

Keep scrolling for more

More Definitions for releaser


re·​leas·​er | \ri-ˈlē-sər \

Medical Definition of releaser 

: a stimulus that serves as the initiator of complex reflex behavior

More from Merriam-Webster on releaser

See words that rhyme with releaser

Comments on releaser

What made you want to look up releaser? Please tell us where you read or heard it (including the quote, if possible).


noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!