- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
aconcagua
-
zebra-tailed lizard
-
rum
-
no way
-
release
-
go steady
-
goodness
-
tryout
-
bagel
-
academic department
- Hide translation
10-4
10-4 /tɛn fɔr/
interjection
-
(
)
[American]
Acknowledgment of message received
(
10-4
[American] , ten-four
[American] )
acknowledgment of message received