WordReference Random House Unabridged Dictionary of American English © 2026
fos′ter broth′er, 
  1. Sociologya boy brought up with another child of different parents.
  • bef. 1000; Middle English; Old English fōster brōthor

'foster brother' also found in these entries (note: many are not synonyms or translations):
Kay

Forum discussions with the word(s) "foster brother" in the title:


Look up "foster brother" at Merriam-Webster
Look up "foster brother" at dictionary.com
  • Go to Preferences page and choose from different actions for taps or mouse clicks.

In other languages: Spanish | French | Italian | Portuguese | Romanian | German | Dutch | Swedish | Russian | Polish | Czech | Greek | Turkish | Chinese | Japanese | Korean | Arabic

Advertisements
Advertisements
Report an inappropriate ad.
WordReference.com
WORD OF THE DAY
GET THE DAILY EMAIL!

Become a WordReference Supporter to view the site ad-free.