n pl but sing or pl in constr :  an applied science concerned with the characteristics of people that need to be considered in designing things that they use in order that people and things will interact most effectively and safely - called also human engineering , human factors engineering  er*go*nom*ic adj er*go*nom*i*cal*ly adv 
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.