Definitions
1.NounIntense dread, fright, or fear.
2.NounThe action or quality of causing dread; terribleness, especially such qualities in narrative fiction.
3.NounSomething or someone that causes such fear.
4.NounTerrorism."a terror attack; the War on Terror"
5.NounA night terror.
6.AdjectiveA strict teacher who fails most of the students."I have a terror math teacher."