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19.
A monument commemorating humankind's stupid, myopic, uncreative, intolerant, and/or egocentric propensities. An artifice constructed to prevent the natural and inevitable flow of goods, ideas, or people. Although the historic examples of walls are universally viewed as tragic, ineffective, or wasteful for the societies that created them, humans continue to celebrate recent constructions. In almost every case, they believe, for some unknown reason, that this time their wall will be different.

"Hey, I'm pretty sure this plan will work." - André Maginot

"Hey, let's build a wall right through Berlin." - Walter Ulbricht

"Hooray! We'll keep illegals out by building a border fence." - Joe
by Charlie C. December 14, 2007
 
1.
A very technical device designed to separate one area from another, and often to provide security to one or more of the said separated areas. It functions by a complex system of interconnected particles forming an impassible barrier that one should not walk into at medium to high speeds, or one risks damage.
The wall that separates my feet from a sausage melted in the shower of tuna.
by bill December 15, 2002
 
2.
Vagina.
Yo last night I finally stuck it in between her walls.
by Stef "FobPower" De Clercq November 26, 2002
 
3.
The main campus-wide party at New College of Florida in the central courtyard of the Pei Dorms, usually held every Friday and Saturday night. Sometimes but rarely held on weekdays.

A PCP (Palm Court Party) is like a wall but is generally attended by larger crowds and is open to large numbers of friends and guests of students.

The term "wall party" (as in a party next to the wall) was coined in the 70's. The term was later shortened to "wall".
"Who's throwing the wall this Saturday?"

"Are you going to the wall tonight?"

"The music at this wall sucks!"

"Whose idea was it to throw a classical music wall?"

"I got so drunk at the wall last night that I ended up passing out on the couch in Ham center!"
by The Empty Set November 04, 2009
 
4.
someone with no boobs
DAMN! that fat kid definitely aint no wall
by karen December 02, 2004
 
5.
They are primarily used to separate rooms.

i would be able to go into the next room, if it wasn't for this wall.
by Hal June 11, 2003
 
6.
A general term for the female birth canal. Also can refer to the room.
I'm tryin to walk before I crawl I want it all..ever since I came out of my momma's walls. -Y. Zee
by GanJi April 26, 2005
 
7.
1. An important part of a Facebook profile, where friends can leave public messages for one another.
2. A terrible haircut, which is long and sticks up straight in the front, but is short everywhere else. Also known as a reverse mullet.
Jim: "Did you see that message I left on your wall?"
Ryan: "No, not yet."
Jim: "Well, it basically said that you have man boobs."
Ryan: "Thanks."
Jim: "That wasn't a compliment."
Ryan: "Oh."
by Jack324 October 09, 2007