n.
1.a chemical reaction in which an acid and a base interact with the formation of a salt
2.action intended to keep a country politically neutral or exclude it from a possible war
3.(euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)
4.action intended to nullify the effects of some previous action
Idiom of the Day
hale and hearty
to be in very good health, to be well and strong
My uncle is hale and hearty and he never gets sick.