(psychology) Initialism of unconditioned stimulus.

Abbreviation of undersize. / Abbreviation of unserviceable.

Initialism of Upper Sorbian.

The act of using. / (uncountable) The act of consuming alcohol or narcotics. / (uncountable, followed by "of") Usefulness, benefit. / A function; a purpose for which something may be employed.

(transitive) To employ; to apply; to utilize. / (transitive, often with up) To expend; to consume by employing. / (transitive) To exploit.

Having a practical or beneficial use.

pointless, useless; not worth doing, especially because it is not likely to succeed / (colloquial) No point or advantage.

The quality or degree of being useful.

plural of use

(law) A form of equitable ownership peculiar to English law, by which one person enjoys the profits of lands, etc. whose legal title is vested in another in trust.