Loose End Definition

noun
A minor unresolved problem or difficulty, especially a final detail preceding the completion of something.
The loose ends of the movie's plot are resolved in its sequel.
American Heritage

The end of a rope that has not been fastened.

Wiktionary

(idiomatic, by extension) A small job that needs to be done, or minor problem that needs to be resolved, before a task can be considered complete.

Wiktionary
Synonyms:
  • unfinished business

Idioms, Phrasal Verbs Related to Loose End

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