What does sidecar mean?
A sidecar is something or someone that accompanies a principal person, activity, or vehicle in a secondary role. Figuratively, the word can describe an assistant, affiliated group, or subordinate operation that supports a larger effort: for example, a campaign may have a local organization serving as a political sidecar. The word also has a concrete meaning, referring to the small passenger compartment historically attached to the side of a motorcycle. Because it evokes a vehicle that travels beside rather than in front, “sidecar” often carries a sense of companionship combined with lesser importance. It can be affectionate when the relationship is cooperative and mutually beneficial, but it may sound diminishing when it implies dependence or an unimportant supporting role. The metaphor is especially associated with British and Commonwealth usage.
nounA person or thing that accompanies someone or something, especially in a subordinate or supporting role. It can also refer to a compartment attached to the side of a motorcycle, motorcycle, or similar vehicle.
- A person who accompanies another, especially in a subordinate or supportive role.
- A person, organization, or thing that runs alongside a more important person, organization, or operation.
- A compartment or vehicle attached to the side of a motorcycle or similar vehicle.
"The young researcher served as a valuable sidecar to the team's lead scientist."
"The campaign manager acted as a sidecar to the candidate, handling logistics while the candidate delivered the public speeches."
"The motorcycle pulled into the garage with a small sidecar full of luggage."
The plural is formed by adding -s.
"The two organizations functioned as sidecars to the larger alliance."
A sidecar began as a literal companion compartment bolted to a motorcycle and grew into a metaphor for anyone who supports the main event from the side.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of sidecar
The word was formed in the late 19th century from “side” and “car.” Its earliest sense was a compartment attached to the side of a motorcycle or other vehicle, modeled on the sidecar carriage used on vehicles such as trams. The figurative sense, meaning a subordinate companion or associated person or thing, developed from the physical image of a vehicle traveling alongside another.
Related word forms
How sidecar is actually used
In figurative use, “sidecar” often suggests a dependent or supporting role and can sound mildly dismissive when used to describe a person. It is more common in British, Australian, and New Zealand English than in American English, though it is understood in American English too.
Easily confused with sidecar
A sidecar is an accompanying person, thing, or vehicle compartment, whereas a sidebar is a section alongside the main content of a page, document, or screen.