any shape that is triangular in cross section
"The carpenter carefully cut a wedge from the oak log to fit it into the door frame."
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
"After work, he grabbed a hearty wedge from the deli to fuel up for his evening shift."
a heel that is an extension of the sole of the shoe
"The designer added a wedge to the flat sandal, creating a comfortable yet elevated look."
(golf) an iron with considerable loft and a broad sole
"The golfer chose to use his sand wedge to get out of the difficult lie near the water hazard."
something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them
"The carpenter drove a wooden wedge between the split planks to force them apart."
One of the simple machines; 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.
"In the ancient Cambridge tradition, the student at the bottom of the Classical Tripos list was affectionately called 'the wedge' by his peers."
The person whose name stands lowest on the list of the classical tripos.
In plain English: A wedge is a thin, triangular piece of something that you can use to lift things up or separate them apart.
"She used a wooden wedge to lift the heavy stone slightly off the ground."
Usage: Use "wedge" as a noun to describe a thick, tapered tool used for splitting objects or creating space between them. When referring to social dynamics, it often implies forcing one's way into a group by inserting oneself at the bottom of an established hierarchy.
To support or secure using a wedge.
"The carpenter used a wooden wedge to secure the loose doorframe in place."
In plain English: To wedge something means to push it tightly into a narrow space so that it gets stuck there securely.
"She wedged her umbrella under the door to keep it from blowing away."
A surname.
"The wealthy Wedge family has lived in this coastal town for generations."
The word wedge comes from the Old English weċġ, which originally meant a tapered tool used for splitting or lifting objects. This term traces its roots back through Middle English to the Proto-West Germanic language family.