Upper-class. / Recognized for its quality.

Having a pretentious, high-class attitude

Possessing great physical or political power. / Vigorous and energetic. / (of an optical instrument) Capable of great magnification.

Of high quality, particularly good.

A junior high school.

expensive

Operating at relatively high pressure, such as several times atmospheric pressure. / Tense; stressful. / Involving much persuasion.

Having an elevated or moralistic tone; pompous. / Oratorial, sometimes to the point of sounding contrived.

(footwear) Having tall heels. / Wearing high heels.

That operates, moves or takes place at a greater than normal speed.