grok: /grok/, var. /grohk/ vt. [from the novel “Stranger in a Strange Land”, by Robert A. Heinlein, where it is a Martian word meaning literally `to drink\‘ and metaphorically `to be one with\’] The emphatic form is `grok in fullness\‘. 1. To understand, usually in a global sense. Connotes intimate and exhaustive knowledge. – The Jargon File 4.2.0