Durability is when something lasts a long time. The durability of your favorite pair of hiking boots keeps them from wearing out even when you've walked many miles in them.

Use the noun durability to describe the quality of permanence or strength that keeps something working or holds it together. Your parents' thirty year marriage has durability, and your sturdy old car that keeps on running mile after mile also has durability. The Latin root word, durabilis, means "lasting or permanent," and comes from durare, "to last or harden."

Definitions of durability
  1. noun
    permanence by virtue of the power to resist stress or force
    “they advertised the durability of their products”
    synonyms: enduringness, lastingness, strength
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    tensile strength
    the strength of material expressed as the greatest longitudinal stress it can bear without tearing apart
    the strength to resist destruction
    continuity, persistence
    the property of a continuous and connected period of time
    the property of remaining unchanged
    the property of lasting forever
    type of:
    permanence, permanency
    the property of being able to exist for an indefinite duration
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