Learning conducted or acquired late in life; an instance of this.

(esp. with reference to animals) learning that is unintentional and unmotivated or that occurs without any apparent reinforcement.

The exposure of a sleeping subject to lessons played on a radio, tape recorder, etc.; teaching or learning by this method, ‘sleep-learning’.

naming of (the) parts: the process of becoming acquainted, or of acquainting others, with the essentials of an unfamiliar object or topic.

learning during sleep, esp. by exposure to radio, tape-recordings, etc. (cf. hypnopaedia, n.).

slang. sitting next to (also by, with) Nelly: learning an occupation on the job by observing how others do it.

those aspects of a child's education (e.g. speech patterns, codes of behaviour, social attitudes, etc.) which are not part of the formal school…