A sudden, heavy impact or surprising event that can cause mental or emotional disturbance, electrical energy burst, circulatory system failure, or a shock wave in physics.

(automotive, mechanical engineering) A shock absorber (typically in the suspension of a vehicle).

(mathematics) A discontinuity arising in the solution of a partial differential equation.

A chemical added to a swimming pool to moderate the chlorine levels.

An arrangement of sheaves for drying; a stook.

(by extension) A tuft or bunch of something, such as hair or grass.

(transitive) To cause to be emotionally shocked; to cause (someone) to feel surprised and upset.

(transitive) To give an electric shock to.

(transitive) To subject to a shock wave or violent impact.

(transitive) To add a chemical to (a swimming pool) to moderate the chlorine levels.

(geology, transitive) To deform the crystal structure of a stone by the application of extremely high pressure at moderate temperature, as produced only by hypervelocity impact events, lightning strikes, and nuclear explosions.

(transitive) To collect, or make up, into a shock or shocks; to stook.

Causing intense surprise, horror, etc.; unexpected and shocking.