Carefully aware of all circumstances; considerate of all that is pertinent.

A diacritical mark (ˆ) placed over a vowel in the orthography or transliteration of many languages to change its pronunciation; while in some other languages over a consonant.

Having a circumflex mark. / Curving around.

To mark or pronounce with a circumflex.

A route, taken by intercontinental aircraft for instance, which is the shortest distance between two destinations on the surface of the Earth; an arc of a great circle.

(geometry) A circle defined as the intersection of the surface of a sphere and a plane which passes through the centre of the sphere.

(idiomatic, humorous) The trash container; the wastebasket.

An integrated circuit containing analog circuitry operating at frequencies in and above the ultrahigh frequency band.

(uncountable) Unnecessary use of extra words to express an idea, such as a pleonastic phrase (sometimes driven by an attempt at emphatic clarity) or a wordy substitution (the latter driven by euphemistic intent, pedagogic intent, or sometimes loquaciousness alone).

A situation in which the response to one problem creates a chain of problems, each making it more difficult to solve the original one.