An opening in anything made by breaking or parting; as, a gap in a fence; an opening for a passage or entrance; an opening which implies a breach or defect; a vacant space or time; a hiatus; a mountain pass.
To notch, as a sword or knife.
To make an opening in; to breach.
The vertical distance between two superposed surfaces, esp. in a biplane.
The leader can never close the gap between himself and the group. If he does, he is no longer what he must be. He must walk a tightrope between the consent he must win and the control he must exert. Vince Lombardi
The great enemy of clear language is insincerity. When there is a gap between one's real and one's declared aims, one turns, as it were, instinctively to long words and exhausted idioms, like a cuttlefish squirting out ink. George Orwell
I've been looking at some video clips on YouTube of President Obama - then candidate Obama - going through Iowa making promises. The gap between his promises and his performance is the largest I've seen, well, since the Kardashian wedding and the promise of 'til death do we part. Mitt Romney