1. The study of how a workplace and the equipment used there can best be designed for comfort, efficiency, safety, and productivity.
2. The science of making things fit people instead of asking people to fit things.

Ergonomics uses knowledge from anatomy, mechanics, physiology and psychology to utilize human energy most effectively.

Something that is ergonomic is designed for safe, comfortable, and efficient use; for example, a computer keyboard with an ergonomic design is designed to help the user avoid carpal tunnel syndrome and wrist pain.

3. The quantitative study of the distribution of work performance and efficiency of social insects.