Khloe Kardashian & Lamar Odom's Secret Meeting -- She's Trying to Save Him

Khloe Kardashian has met with Lamar Odom ... and she is desperately trying to save his life -- TMZ has learned.

Sources familiar with the situation tell us, Khloe found Lamar and drove to see him at an undisclosed location.

As TMZ first reported ... Lamar has plunged into the dark world of crack cocaine and Khloe effectively separated from him after throwing him out of the house last Wednesday when he rejected a family intervention.

We're told Khloe has not given up on Lamar although she says she will never get back with him until he's clean. On the other hand, we've learned she has taken no steps to file for divorce because she believes there's still a chance Lamar can be saved.

We do not know how Lamar has received Khloe's latest plea.