- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
go it alone
-
inability
-
actinidia chinensis
-
acl
-
trial and error
-
clock face
-
action stations
-
eyes
-
connexion
-
drake
- 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