look up any word, like the eiffel tower:
 
8.
A person, normally in high school, who knows/sees everything that goes on around them, but doesn't say a word about them. They go unnoticed as if they don't belong. Yet if you were to talk to them, you could tell them every single thing and they would not judge you, not one bit.
He's a wallflower. You see things, you keep quiet about them. And you understand.
by effygee October 30, 2011
 
9.
Perennial plant native to southern Europe, bearing fragrant yellow and orange flowers. The name is derived from the fact that the plant, when naturalized to a region, is often found growing out of the nooks and crannies in an old wall, or a cliff. The natural tendency for this plant to separate itself from the other denizens of a formal garden, and grow in isolated locations, doubtless led to the use of the term "wallflower" to describe an anti-social, or shy individual, who lingers in the background, against the wall, as it were, at social occasions.
The heady fragrance of wallflowers growing on the embankment wafted up to me.
by Rod Brock July 24, 2006
 
10.
Someone who could be called shy, someone who doesn't feel comfortable around other people. They don't like to have attention on them because it makes them uncomfortable. They like to stay off to the side at parties or dances. They have trouble talking to people because they don't know what to say. Talking to new people is not their strongest point, and standing up in front of people can make them feel awful. They may act fake around their friends to hide their real quiet personality, but to everyone else, they're invisible. Just because they're "antisocial" doesn't mean they're snobby. They just would rather watch then be involved. They know things about people that you would never know unless you watched as closely as them. You could tell anything to a wallflower and they'd never tell anyone because they try to avoid talking to people. They can be the best people, if you take the time to crack their thick shell. The opposite sex doesn't seem to consider them very much, but if you got to know them, they'd be great. They are usually attracted to other wallflowers because they are like eachother. Wallflowers are beautiful.
by This wallflower March 20, 2013
 
11.
Noun:

1. A person who has no one to dance with, someone who feels awkward, shy or excluded at a party.
2. Someone who fades into the background, who stays on the sidelines of many social activities.
"He's a wallflower..you see things. You keep quiet about them and you understand."
by deodorant October 02, 2012
 
12.
You see things.
You keep quiet about them.
And you understand.
Charlie from Perks of Being A Wallflower is a wallflower.
by Alexlsajdlakjdla February 21, 2013
 
13.
A wallflower: The odd person at a social event/party who stands to the side, fades into the background, as they are too shy to ask someone to dance or no one wants to dance with them; This isn't generally based on the person being appealing in a attractive level.

Though when someone looks through the throng of moving bodies and goes over to this ,presumably, oddity of a person and gets to them they discover they're the most interesting person they have ever met.
“He's a wallflower. You see things. You keep quiet about them. And you understand.” -Stephen Chbosky,The Perks of being a wallflower.
by ϞSᴜᴍᴍᴇʀ Rᴏsᴇ. ϯ February 08, 2013
 
14.
Somebody in the background. Not attention-getting at first glance. Like part of the wallpaper.
That group of girls in the corner looks like wallflowers.
by Jay mo zee September 05, 2009