- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
imperative
-
lay down
-
go bad
-
draftee
-
eager
-
contents
-
acanthopterygii
-
urbanization
-
adjuncts
-
didn't
- Hide translation
10-4
10-4 /tɛn fɔr/
interjection
-
(
)
[American]
Acknowledgment of message received
(
10-4
[American] , ten-four
[American] )
acknowledgment of message received