TNLN

Take Nothing Leave Nothing

What you have to do when in the outdoors.

by AbuBamsry August 28, 2003

TNLN

Neither taking nor leaving anything in a trading opportunity.

When I found the geocache I Took Nothing Left Nothing.

by Magnus Dahlgren January 1, 2004

TNLNSL

Took Nothing Left Nothing Signed Log - Term used as shorthand for geocaching.

I found the cache, TNLNSL

by Dale August 9, 2004