- Learn English
-
Learn grammar
-
List of words
-
Study your cards
-
Hang On, Man!
-
Audio Books
-
More apps
- Recent searches
-
bellied
-
start
-
acapnotic
-
trumpet
-
achillea millefolium
-
okay
-
schematic
-
joint
-
explode a bombshell
-
acridine
- Hide translation
10-4
10-4 /tɛn fɔr/
interjection
-
(
)
[American]
Acknowledgment of message received
(
10-4
[American] , ten-four
[American] )
acknowledgment of message received