Definitions:

1. Enduring or having endured for a long period of time. ADJECTIVE
   • The beneficial effects of this medicine are long-lasting.
2. Existing or continuing for a long time. ADJECTIVE
   • One of the long-lasting effects of the infection is damage to a valve in the heart.

Synonyms:

• enduring
• lasting
• lifelong
• long-lived
• perdurable
• permanent
• timeless
• unchanging
• unending