Meaning
To finally decide to do something important or risky after hesitation, especially when the outcome is uncertain.
Origin
Plunge describes a sudden movement down into water or another depth. The idiom takes the decisive moment of jumping in, rather than cautiously testing the water, as an image of commitment. The figurative sense is common for changing careers, starting a business, moving abroad or making a major personal decision. It highlights the psychological threshold between hesitation and action, not necessarily reckless behavior. The water metaphor has broad parallels in European languages, but similarity of imagery does not prove that any one language borrowed the expression directly from another. The expression’s precise first figurative use requires historical citation.
Examples
After months of hesitation, she took the plunge and opened a café.
I finally took the plunge and applied for the job.
Are you ready to take the plunge?
Frequently asked questions
What does 'Take the plunge' mean?
To finally decide to do something important or risky after hesitation, especially when the outcome is uncertain.