(anatomy) The part of the respiratory tract consisting of the nose, oral cavity, pharynx and larynx.

(botany) That part of a leaf and petiole that grows from an apical meristem.

plural of upper middle class

(idiomatic) impecunious, lacking money

(dated) The ten thousand people, more or less, who are highest in position or wealth; the upper class; the aristocracy.

(of a real-valued function on a topological space) Such that, for each fixed number, the subspace of points whose images are at least that number is closed.

(US slang) Completely out of money; broke.

(computing) The area of memory between 640 kB and 1 MB in an IBM-compatible PC.

plural of upper leaf zone

A town in Newfoundland, Newfoundland and Labrador, Canada.