Meaning

noun an established custom

originFrom Middle English wont, from Old English ġewunod, past participle of ġewunian (“to be accustomed to, dwell”), the noun sense possibly arising via conflation of wone (“custom, habit, practice”) and the adjective wont. Compare German Low German Gewohnte (“custom, habit”), Dutch gewoonte, Swedish van. Likely related to wone, wonder, wean, and win.

Etymology from Wiktionary, CC BY-SA 3.0