Work done by the way, in intervals of leisure, as opposed to one's main business; = Greek πάρεργον; also depreciatively, work done with ulterior…

Secondary or supplementary work or business; work that is subsidiary to one's ordinary employment. archaic in later use.

Diversion.

transferred and figurative. A turning aside from the business in hand, or from one's regular occupation; avocation. Obsolete.

That which has the effect of calling away or withdrawing one from an occupation. Hence, A minor or less important occupation, a by-work (πάρεργον).

= avocation, n. 2 3.

Originally: an auxiliary business activity or line of merchandise. Later also: an activity done in addition to one’s main job to earn extra income.