SINCE 1828
em
noun
\ ˈem
\
\
Definition of em
(Entry 1 of 3)
1
: the letter m
2
: the width of a piece of type about as wide as it is tall used as a unit of measure of typeset matter
EM
abbreviationDefinition of EM (Entry 2 of 3)
1
electromagnetic
2
electron microscope; electron microscopy
3
end matched
4
engineer of mines
5
enlisted man
em-
prefixDefinition of em- (Entry 3 of 3)
— see en-
Keep scrolling for more
Keep scrolling for more
Comments on em
What made you want to look up em? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Finance Words Quiz
-
- The etymology of mortgage is related most closely to which two words?
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share em
Resources for em