- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
lawson's cypress
-
terminate
-
threw
-
condone
-
abstemious
-
stratified
-
fighting
-
acer glabrum
-
tire
-
cord
- Hide translation
10-4
10-4 /tɛn fɔr/
interjection
-
(
)
[American]
Acknowledgment of message received
(
10-4
[American] , ten-four
[American] )
acknowledgment of message received