To understand profoundly through intuition or empathy.

Taken from the book 'Stranger in a Strange Land,' literally meaning 'to drink' but taken to mean 'understanding.' Often used by programmers and other assorted geeks.

1. Martain word meaning literally, 'to drink'.
2. Also 'love', 'hate', and much more. To grok means to understand and empathize with something or someone to the extent that the object or person becomes part of ones' sense self.
3. To become one with.

To drink in, to make a part of one's self

1. To understand something intimately and completely. (originally from Stranger in a Strange Land, by Robert A. Heinlein)

2. With programs, having sufficient understanding.

To know something in and out and be able to exist in it's embodiment.