A spark ignited the gas fumes.

The case ignited controversy in Ireland.

I ignite the stove.

The police theory is that a most sensational crime has been committed, that the victim was clubbed to death in his own bedroom, his papers rifled, and his dead body dragged across to the wood-stack, which was then ignited so as to hide all traces of the crime.

Fire crews said forests and fields, baked to tinder by the intense heat, were easily ignited by such things as a discarded cigarette or concentration of the sun's rays by a shard of glass.

Tom was asked to speak at a college event, which ignited in him a passion for activism.

A small spark often ignites a big flame.

Tinder is a material that is easily ignited.

The song ignited a passion in the crowd.

That seemingly benign request ignited a furor in Congress over presidential powers and states’ rights.