Em Definition
 ĕm 
    noun
  
 The letter m.
 American Heritage 
A unit of measure the width of a capital M in a type font.
 Webster's New World 
Such a measure for 12-point type; a pica.
 American Heritage 
Synonyms: 
  
- mutton-quad
- em-quad
- pica
- pica em
    abbreviation
  
 Electromagnetic.
 Webster's New World 
Engineer of mines.
 Webster's New World 
Enlisted man (or men)
 Webster's New World 
    pronoun
  
 Them.
 American Heritage 
Them.
 Webster's New World 
    affix
  
 Emboss, empower.
 Webster's New World 
Origin of Em
-  From Middle English hem, em from Old English him, heom dative and accusative pl. of hē he he1 From American Heritage Dictionary of the English Language, 5th Edition 





