A consultant is someone hired temporarily to give expert advice or solve specific problems. Unlike regular employees who work for a company full-time, consultants come in for a particular project or challenge, share their specialized knowledge, then move on to help other clients.

Companies hire consultants when they need expertise they don't have in-house. A hospital might hire a medical consultant to improve patient care. A struggling business might bring in a management consultant to figure out why they're losing money. Schools sometimes hire educational consultants to design better programs or train teachers.

Consultants usually specialize in specific areas: technology, finance, marketing, or countless other fields. They've often solved similar problems many times before, so they can spot solutions faster than someone facing the issue for the first time. A consultant might spend three months helping redesign a company's website, then leave once the project is finished.

The word can also describe doctors who specialize in particular medical areas. In British hospitals, a consultant is a senior specialist doctor, like a consultant cardiologist who focuses on heart problems.

Think of consultants as expert problem-solvers for hire: they swoop in with knowledge, help fix something specific, then head out when the job is done.