Real Dictionary

cybernetics
uncountable noun: Cybernetics is science which involves studying the way electronic machines and human brains work, and developing machines that do things or think like people.

cybernetics in American English
the science dealing with the comparative study of human control systems, as the brain and nervous system, and complex electronic systems
noun: the study of human control functions and of mechanical and electronic systems designed to replace them, involving the application of statistical mechanics to communication engineering

cybernetics in British English
noun: the branch of science concerned with control systems in electronic and mechanical devices and the extent to which useful comparisons can be made between artificial and biological systems