I. ˈyüzə(r) noun
( -s )
Etymology: Middle English, from usen to use + -er
: one that uses ; specifically : a person who uses alcoholic beverages or narcotics
II. noun
( -s )
Etymology: back-formation from non-user (I)
: enjoyment of a right of use : a right to use resulting from long-continued use
claims to arms by user could be allowed only if they went back before 1530 — L.G.Pine