(astronomy) The boundary marking one of the outer limits of the Sun's influence, where the solar wind dramatically slows. / (by extension, astronomy) That point for space around any star.

A severe and rapid systemic allergic reaction to an allergen, constricting the trachea and causing generalized vasodilation.

(fluid dynamics) A shock wave formed by the bow of an object travelling at supersonic speed. / (astronomy) The region of the magnetosphere in which the solar wind slows from supersonic to subsonic.

A website intended to offend or shock, containing frightening and/or distasteful content of a pornographic, scatological, or grotesquely violent nature. In most cases, it displays a particular picture most prominently; some shock sites also show animations or image galleries.

(anthropology, sociology) A state of anxious confusion experienced by someone exposed to an alien or unfamiliar environment.

plural of shock site

(physics) A powerful compression wave produced by the movement of a body through a fluid or gas at a velocity greater than the local speed of sound. / Any violent disturbance.

(dated) Stunned or mentally unbalanced by prolonged stress such as experienced in combat or under fire (shell-fire); suffering from post-traumatic stress disorder.

simple past tense and past participle of shell shock

Alternative form of shell-shocked