wedge 
(wĕj)
(wĕj)n.
1. A piece of material, such as metal or wood, thick at one edge and tapered to a thin edge at the other for insertion in a narrow crevice, used for splitting, tightening, securing, or levering.
2.
a. Something shaped like a wedge: a wedge of pie.
b. A wedge-shaped formation, as in ground warfare.
3.
a. Something that intrudes and causes division or disruption: His nomination drove a wedge into party unity.
b. Something that forces an opening or a beginning: a wedge in the war on poverty.
4. Meteorology See ridge.
5. Sports An iron golf club with a very slanted face, used to lift the ball sharply upward, as from sand.
6. A shoe having a heel that extends across the shank to the half sole, forming a continuous undersurface. Also called wedgie.
7. Downstate New York See submarine sandwich.
8. One of the various triangular marks that are the basic structural elements of cuneiform writing symbols.
9. Sports In snow skiing, the snowplow.
tr.v. wedged, wedg·ing, wedg·es
1. To split or force apart with or as if with a wedge: wedged the board away from the stud; neighbors who were wedged apart by a dispute.
2. To fix in place or tighten with a wedge: wedged the window frame to be level.
3. To crowd or squeeze into a limited space: wedged the books into the backpack.
[Middle English wegge, from Old English wecg.]
wedgetop: wedge golf club
bottom:
wedge sandal
wedge