1. Having existed for a long time
   "a longstanding friendship"; "the longstanding conflict"

See also: long

• cooccurring
• cooee
• cook
• Cook Strait
• cook up
• cookbook
• Cooke
• cooked
• cooker
• cookery
• cookery book
• cookfire
• cookhouse
• cookie
• cookie cutter
• cookie jar
• cookie jar reserve
• cookie sheet
• cookie-sized
• cooking
• cooking apple
• cooking chocolate
• cooking fire
• cooking oil
• cooking pan