One who uses or makes use of something, a consumer/client or an express or implied licensee (free user) or a trespasser. / A person who uses drugs, especially illegal drugs.

plural of user

(programming, slang) Someone who uses the R programming language.

plural of useR

Alternative spelling of username

The final consumer of a product; the intended recipient or user.

(computing) The visual part of a software application that a user sees and interacts with.

(computing) A person who makes heavy use of computers, running many applications and capable of using advanced functionality.

(computing) The desired, expected, or actual experience of a user interacting with a product, especially as it relates to the design of the product's user interface.

(chiefly computing) Designed to be easy for an untrained user to use, with intuitive ordering of steps, consistent and logical placement of controls, etc.