[uncountable and countable]problems or difficultiesCOLLOCATIONS COLLOCATIONS have trouble (with something) have (no) trouble doing something without any/too much trouble (=easily) cause trouble serious trouble terrible trouble trouble ahead (=trouble in the future) teething troubles (=small problems at the start of something new) spell trouble (for somebody) (=there is going to be trouble) what seems to be the trouble? (=used for politely asking why someone is complaining) be asking for trouble (=be silly or dangerous) trouble free (=with no trouble)
We'rehavinga lot oftrouble withthe new computer system.
He had to retire from the race because of trouble with the gearbox.
WORD CHOICE: WORD CHOICE: trouble, problem, troubles!! Trouble is usually an uncountable noun. Never say 'a trouble'• He has caused me a lot of trouble (NOT troubles). • Are you having trouble (NOT a trouble) with your car?A problemis a specific thing that causes worry or difficulty• My biggest problem is shyness. • There were a lot of problems with his work. • They're having problems in their marriage.Your troublesare your worries• Sit down here and forget your troubles (OR problems) for a minute.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.