Any lachrymatory non-lethal chemical compound that causes the eyes to sting and water and/or irritates the respiratory system, mostly used for controlling crowds during riots or as self-defense
a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds
Tear gas is a gas that causes your eyes to sting and fill with tears so that you cannot see. It is sometimes used by the police or army to control crowds. Police used tear gas to disperse the demonstrators. Any of various agents that on dispersal, usually from grenades or projectiles, irritate the eyes and cause blinding tears. a gas that stings your eyes, used by the police to control crowds. Any of a group of substances, most often synthetic organic halogen compounds, that irritate the mucous membranes of the eyes, causing a stinging sensation and tears. They may also irritate the upper respiratory tract, causing coughing, choking, and general debility. Tear gas was first used in warfare in World War I, but since its effects are short-lasting and rarely disabling, it came into use by law-enforcement agencies as a means of dispersing mobs, disabling rioters, and flushing out armed suspects without the use of deadly force