WordWeb Online

1. Existing for a long time
   "hopes for a durable peace"; "a durable relationship";
   - lasting, long-lasting, long-lived
    
2. Capable of withstanding wear and tear and decay
   "durable denim jeans";
   - long-wearing [N. Amer], hard-wearing
    
3. Very long lasting
   "less durable rocks were gradually worn away to form valleys";
   - indestructible, perdurable, undestroyable

See also: imperishable, long, serviceable, stable

Encyclopedia: Durable