What is the meaning of Wear_and_tear?

Physical damage caused to an object due to ordinary use over time; specifically , as justifying a write-down of the object's value in a set of accounts, or exclusion of compensation for the object under a warranty of quality.

The process by which such physical damage is caused.

The cost payable for such physical damage.

Damage or deterioration caused to something intangible due to harsh conditions, the passing of time, etc.; also, the process by which such damage or deterioration is caused.

One's ability to endure harsh conditions; resilience, toughness.

1. To cause (something) physical damage due to ordinary use over time; to wear (down).
2. To cause emotional damage to (someone's feelings, spirit, etc.).

To cause (something) physical damage due to ordinary use over time; to wear (down).

To cause emotional damage to (someone's feelings, spirit, etc.).

Of a thing: to be caused physical damage due to ordinary use over time.

Source: wiktionary.org