What does copilot mean?
A copilot is the second pilot aboard an aircraft, seated alongside the captain and qualified to fly, navigate, and communicate on behalf of the crew. In commercial aviation the copilot is formally known as the first officer and is fully capable of taking control when needed; the division of labor between captain and copilot is a core safety feature of modern flight. Beyond aviation, the word has expanded into everyday language as a metaphor for any trusted assistant — a colleague who helps steer a project, or, most prominently today, an artificial-intelligence program branded under names such as Microsoft's Copilot. This figurative sense preserves the original idea: the copilot shares the workload but does not displace the person ultimately in command. The term carries connotations of partnership, reliability, and shared responsibility, making it a useful word both for describing cockpit crews and for talking about human–machine collaboration in general.
nounA second pilot in an aircraft who assists the pilot in command in flying and navigating the plane; by extension, a person who assists someone else in a task or activity.
- A qualified pilot who serves as second-in-command of an aircraft, sharing flying duties with the captain.
- A person or system (increasingly an AI program) that acts as an assistant, helping someone perform a task while they remain in charge.
"The captain and her copilot worked through the preflight checklist before takeoff."
"The copilot took over the radio calls while the captain focused on the landing."
"She treats the new software like a copilot, drafting ideas that she still has to approve herself."
Standard pluralization applies; no special usage rules.
"Both copilots logged hours on the transatlantic route."
Microsoft borrowed the name 'Copilot' for its AI assistant — proof that this aviation term has become shorthand for any trusted helper who shares the controls.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of copilot
'Copilot' formed in English during the early twentieth century from the prefix 'co-' (meaning jointly or together, from Latin) combined with 'pilot', the established term for someone who steers an aircraft or guides ships into harbor. The compound arose naturally once aircraft grew complex enough to require two crew members in the cockpit. Its root, 'pilot', entered English via French from an earlier source associated with steering and navigation, and it also gives us cognate compounds such as 'autopilot', which performs the same guiding role mechanically.
How copilot is actually used
Originally an aviation term, 'copilot' has broadened informally to mean any assistant, especially since tech companies adopted it for AI helpers. The plural is standard. It is typically written without a hyphen in modern usage, though older texts may show 'co-pilot'.
Easily confused with copilot
A pilot is the person who commands and flies an aircraft, while a copilot is the second crew member who assists rather than commands.