pron

• We, used in the same circumstances where "me" would be used instead of "I", e.g. for the pronoun in isolation or as the complement of the copula:
  "Who's there? — Us. (or) — It's us."
• (colloquial) The person(s) being addressed.
  "Come on! Wakey wakey! Let's get us up and out of bed, please."
• (colloquial) Used to imply connection between the speaker's experiences or activities and a group of listeners.
  "Hey guys, in this video I'll show you how I make my upside-down sponge cake. First let's get us a few ingredients that we'll need ..."
• (Commonwealth, colloquial, chiefly with certain verbs such as give, get, fetch, etc.) Me.
  "Give us a look at your paper."

det

• (proscribed) Designates the speaker(s)/writer(s) as constituting or belonging to the stated category of people (subjective case).
  "Us gays and lesbians in here got a reason to be bitching about the conditions."
• (Northern England, Nottinghamshire) Our.
  "We'll have to throw us food out."

noun

• (rare) Alternative form of u's.

noun

• (psychology) Initialism of unconditioned stimulus.
• (medicine) Initialism of ultrasonography (ultrasound).