- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
active birth
-
antihero
-
wood
-
mephitis macroura
-
adansonia gregorii
-
ad spend
-
adad
-
adam's needle
-
woes
-
jowl
- Hide translation
FO
FO /ef oʊ/
noun
-
(military) an officer holding the rank of major or lieutenant colonel or colonel
(
field officer
, field-grade officer
, FO
)
(military) an officer holding the rank of major or lieutenant colonel or colonel