Dictionary

A distressing or dangerous situation.

Example: He was in trouble when the rain started.

A difficulty, problem, condition, or action contributing to such a situation.

Example: The trouble was a leaking brake line.   The trouble with that suggestion is that we lack the funds to put it in motion.   The bridge column magnified the trouble with a slight tilt in the wrong direction.

A violent occurrence or event.

Example: the troubles in Northern Ireland

Efforts taken or expended, typically beyond the normal required.

Example: It's no trouble for me to edit it.

To disturb, stir up, agitate (a medium, especially water).

To mentally distress; to cause (someone) to be anxious or perplexed.

Example: What she said about narcissism is troubling me.

In weaker sense: to bother or inconvenience.

Example: I will not trouble you to deliver the letter.

To take pains to do something.

Example: I won't trouble to post the letter today; I can do it tomorrow.

(Australian rhyming slang) Wife.