(computing) A program or subroutine, provided by the user rather than being built into the system, that may return a value and may take input parameters.

Alternative spelling of usable

Of or pertaining to usury. / Exorbitant.

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

The quality of being user-friendly.

A person who is injured or disabled and uses a wheelchair, usually long-term.

Alternative spelling of user-friendly

(Internet) A communications protocol that has no error recovery features, and is mostly used to stream material over the Internet.

Difficult to use, especially for an untrained user.

bad, cruel or unkind treatment