1 tr. set fire to; cause to burn.
2 intr. catch fire.
3 tr. Chem. heat to the point of combustion or chemical change.
4 tr. provoke or excite (feelings etc.).
Derivatives:
ignitable adj. ignitability n. ignitible adj. ignitibility n.
Etymology: L ignire ignit- f. ignis fire
Useful english dictionary. 2012.