Alternative spelling of high-tension.

Of a sound, having a high pitch. / (dated) Haughty. / (of a steam locomotive boiler) Placed higher than was usual.

(idiomatic, US) Well off; living comfortably or extravagantly due to great wealth or financial security.

Alternative spelling of hightail it.

Alternative form of highchair

(physics) of an elementary particle, or the equivalent electromagnetic radiation, having an energy greater than a hundred thousand electron volts

a conspicuous position, intentionally attracting attention

Synonym of high-profile

Important or well publicized.

A chemical explosive capable of detonation rather than solely of deflagration; a chemical explosive capable of reacting at a sufficiently-fast rate to produce a shock wave which propagates the reaction throughout the explosive mass; a chemical explosive capable of producing an explosion even when unconfined.