Meaning

noun how something is done or how it happens

noun characteristic or habitual practice

noun the latest and most admired style in clothes and cosmetics and behavior

originInherited from Middle English facioun, from Anglo-Norman fechoun (compare Jersey Norman faichon), variant of Old French faceon, fazon, façon (“fashion, form, make, outward appearance”), from Latin factiō (“a making”), from faciō (“do, make”); see fact. Doublet of faction.

Etymology from Wiktionary, CC BY-SA 3.0