noun
sidecar
SYDE-kahr/ˈsaɪdkɑːr/
A passenger compartment mounted beside a motorcycle.
The motorcycle has a sidecar attached beside its main frame.

Etymology
The pieces combine a flank or lateral position with a wheeled vehicle. In the motorcycle sense, the passenger vehicle is attached beside the motorcycle rather than forming part of its main body.
In context
there was a chaplain and a driver riding in a motorcycle with sidecar attached
More examples
- She attaches a sidecar to her motorcycle for longer trips.
- The sidecar has a small windshield to protect the passenger.
- Motorcycles with sidecars need extra room on narrow roads.
Forms
sidecar · sidecars