From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( v. t.) To make an opening in; to breach.

(2): ( v. t.) To notch, as a sword or knife.

(3): ( n.) 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.

(4): ( n.) The vertical distance between two superposed surfaces, esp. in a biplane.

Wilson's Dictionary of Bible Types [2]

 Ezekiel 13:5 (a) In a peculiar way the Lord is describing certain conditions in the national life of Israel wherein their sins made openings for Satan to enter, and the emissaries of Satan to destroy.

 Ezekiel 22:30 (a) Probably it is a type of the gulf between the Lord and His sinning people. Christ Jesus came to fill up this gap and to bring us to God. In those days perhaps it referred also to the lack of a high priest who would be faithful to God, or also to a godly king who would stand between an angry God and a disobedient people.