The American Heritage® Dictionary of the English Language, 4th Edition
n. A school of psychology that confines itself to the study of observable and quantifiable aspects of behavior and excludes subjective phenomena, such as emotions or motives.
n. an approach to psychology focusing on behavior, denying any independent significance for mind and assuming that behavior is determined by the environment
the GNU version of the Collaborative International Dictionary of English
n. an approach to psychology that emphasizes observable measurable behavior.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an approach to psychology that emphasizes observable measurable behavior
Word Usage
"You and I both know why Skinner's behaviorism is classified as 'failed' – because once upon a time (on the order of years, rather than many decades or centuries) it was popular."