IPA: /ˌævəˈkeɪʃən/
KK: /ævəˈkeɪʃən/
A job or activity that someone does in addition to their main job, often for enjoyment or personal interest.
Her avocation as a painter brings her great joy outside of her regular job as a teacher.
Avocation is formed from "a-" (meaning away from) and "vocare" (meaning to call). The word refers to a calling or activity that diverts one from their main vocation or occupation, hence an avocation is something pursued away from one's primary work.
Think of being 'called away' from your main job — 'a-' means away from, and 'vocare' means to call. This helps you remember that an avocation is a secondary interest or hobby.