(uncountable) Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.

Impossible to permeate. / Not allowing passage, especially of liquids; waterproof.

Not easily perturbed, upset or excited. / Calm and collected, even under pressure.

A small round confection having a hard sugar coat and a soft minty centre; sometimes given to customers at the end of a restaurant meal when they pay the bill.

(UK, Commonwealth of Nations) A unit of liquid volume in the imperial system equal to 0.568 litres and divided into 20 fluid ounces.

Not noticeably; too small to be detected; too little to be perceived. / Beyond the purview of man; too great and all-encompassing to be perceived.

not perceptible, not detectable, too small in magnitude to be observed / beyond the purview of man; too great and all-encompassing to be perceived.

(uncountable) Lack of pertinence; irrelevance. / (countable) An instance of this; a moment of being impertinent. / (uncountable) The fact or character of being out of place; inappropriateness.

Of, or relating to imperialism.

An advocate of imperialism.