Learning is a change in behaviour that is due to experience. Or an effect of experience in behaviour.(Lanchman,1997)

Learning means changes in the behaviour of an organism that result from the regularities in the environment of an organism. (Skinner, 1938,1984)

Learning is the adaptation of an individual organism to its environment during the lifetime of the individual (Skinner, 1938, 1984).

Domjan(2010) defines learning as an enduring change in the mechanisms of behavior.

Learning refers to a specific change in the organism, more particularly a change in mental constructs eg Knowledge, representations and associations. (Cognitive definition of learning)

Learning involves some kind of change in the organism, and this change is necessary but not sufficient for observing a change in behaviour. (Damjan,2010; Lachman,1997; Ormarod,1999,2008.