Etymology
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wedge (n.)

Old English wecg "a wedge," from Proto-Germanic *wagjaz (source also of Old Norse veggr, Middle Dutch wegge, Dutch wig, Old High German weggi "wedge," dialectal German Weck "wedge-shaped bread roll"), of uncertain origin; perhaps related to Latin vomer "plowshare." From 1610s in reference to other things shaped like a wedge. Of women's shoes or shoe-heels, from 1939. Wedge issue is attested from 1999.

wedge (v.)

early 15c., "jam in place with a wedge; tighten with a wedge," from wedge (n.). Figurative sense "drive or pack (into)" is from 1720. Meaning "split (something) apart with a wedge" attested by 1853. Related: Wedged; wedging.

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Definitions of wedge
1
wedge (n.)
any shape that is triangular in cross section;
Synonyms: wedge shape / cuneus
wedge (n.)
a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States;
Synonyms: bomber / grinder / hero / hero sandwich / hoagie / hoagy / Cuban sandwich / Italian sandwich / poor boy / sub / submarine / submarine sandwich / torpedo / zep
wedge (n.)
a diacritical mark (an inverted circumflex) placed above certain letters (such as the letter c) to indicate pronunciation;
Synonyms: hacek
wedge (n.)
a heel that is an extension of the sole of the shoe;
Synonyms: wedge heel
wedge (n.)
(golf) an iron with considerable loft and a broad sole;
wedge (n.)
something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them;
wedge (n.)
a block of wood used to prevent the sliding or rolling of a heavy object;
Synonyms: chock
2
wedge (v.)
put, fix, force, or implant;
Synonyms: lodge / stick / deposit
wedge (v.)
squeeze like a wedge into a tight space;
Synonyms: squeeze / force
From wordnet.princeton.edu