on-ramp
on–ramp
noun \ˈȯn-ˌramp, ˈän-\Definition of ON-RAMP
: a ramp by which one enters a limited-access highway
See First Known Use of ON-RAMP
1958
Browse
Seen & Heard 
What made you want to look up on-ramp? Please tell us where you read or heard it (including the quote, if possible).
