Need for Closure
A psychological drive to reach a definitive answer or resolution, especially when facing ambiguity or uncertainty.

A cognitive and emotional motivation to obtain a clear, definitive conclusion or resolution rather than remain in a state of ambiguity. First studied systematically in social psychology, it describes how people vary in their tolerance for uncertainty and their urgency to settle questions, make decisions, or reach closure on unresolved matters.
What this means in real life
After a breakup, someone with high need for closure might immediately seek explanations and want a final conversation to understand exactly what went wrong, while someone with low need for closure might be comfortable leaving things unsaid and moving forward without answers.
What it isn’t
It is not the same as being decisive or action-oriented in general. Someone can be decisive about practical matters but still tolerate ambiguity well, or conversely, feel driven to resolve emotional or intellectual uncertainties even when no action is required.
Commonly misused online
Often conflated with simply 'wanting closure' after a breakup or loss. Online, people use it to mean any desire to end a relationship or situation, missing that the psychological concept specifically describes how much discomfort someone feels with unanswered questions.