Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: an act of sending or letting in : injection, admission, introduction
: something introduced
: commixture sense 2
You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.
Start your free trial today and get unlimited access to America's largest dictionary, with:
Latin immission-, immissio, from immissus past participle of immittere to send in (from in- in- entry 2 + mittere to send) + -ion-, -io -ion
Keep scrolling for more
Resources for immission
Comments on immission
What made you want to look up immission? Please tell us where you read or heard it (including the quote, if possible).
characteristic trappings or dress
Get Word of the Day daily email!
Name that Food Quiz
Test your visual vocabulary with our 10-question challenge!
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
How the '&' got its name
Impress your friends, annoy your relatives.
Words from the week of 9/14/2018
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Test your knowledge of food and food words.
A quiz in common time.
SCRABBLE® fans, sharpen your skills!