(psychology) Initialism of unconditioned stimulus.

Abbreviation of undersize. / Abbreviation of unserviceable.

Initialism of Upper Sorbian.

Having a practical or beneficial use.

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.

The quality or degree of being useful.

(personal) Me and at least one other person; the objective case of we. / (Commonwealth of Nations, colloquial, chiefly with give) Me. / (Northern England) Our. / (Tyneside) Me (in all contexts).

The speakers/writers, or the speaker/writer and at least one other person.

Alternative spelling of µs: microsecond