1. the quality or state of being unable to be reversed, undone, or returned to a previous condition
Usage: often used in scientific, philosophical, and everyday contexts
2. in thermodynamics, the property of a process that cannot spontaneously return to its initial state without external work
Usage: technical; physics and chemistry

Examples

• The irreversibility of aging is a fact of human life.
• Once you delete the file permanently, the irreversibility of the action means it cannot be recovered.
• The irreversibility of certain chemical reactions makes them useful in industrial processes.
• Climate scientists warn about the irreversibility of some environmental damage.
• The irreversibility of time is a central theme in physics and philosophy.
• She understood the irreversibility of her decision to move abroad.