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6.
If you are "all square" with someone (as opposed to being just a square), or you are cool with that person, then you are 5 x 5.
We talked through our differences, so now we are 5 x 5.
by socrates+ January 27, 2006
 
1.
5x5
Actually, it is a radio term but it means Loud and Clear, not I hear you and you hear me.
RTO 1: I've got you 5X5.
RTO 2: Roger, I've got you lima charlie.
by Tag Team August 26, 2007
 
2.
In voice procedure (the techniques used to facilitate spoken communication over two-way radios) a station may request a report on the quality and strength of signal they are broadcasting. In the military of the NATO countries, and other organizations, the signal quality is reported on two scales; the first is for signal strength, and the second for signal clarity. Both these scales range from one to five, where one is the worst and five is the best. The listening station reports these numbers separated with the word "by". Five by five therefore means a signal that has excellent strength and perfect clarity -- the most understandable signal possible.

Five by five by extension has come to mean "I understand you perfectly" in situations other than radio communication, the way Loud and Clear entered slang, post-WW2.

It is sometimes used as slang term to mean "everything is good". The character "Faith" from the "Buffy The Vampire" TV series used it this way.

Sometimes also used in athletic training.
A radio operator would ask: "Radio check -- how am I coming in?" A responder could say; "You are coming in 5 x 5 (5 by 5)". (This means that your signal strength and clarity are both 5 out of a 1-5 scale, where 5 is the best strength and clarity.)

Or, as slang:
A person would ask; "How are you doing?" The responder could say; "I'm 5 x 5." (5 by 5, meaning I'm doing/feeling great.)
by phreich May 01, 2010
 
3.
5x5
Used in "Buffy the Vampire Slayer" by the character Faith, the second slayer to mean all is good
"Are you good to go?"
"All is 5x5"
by mgood August 15, 2007
 
4.
5x5
It's a radio term. It means I hear you with adequate signal strength and adequate clarity. The scale of each of these was 1 through 10, with ten the strongest. Technically, a 10x10 would be the best. But anything down to 5x5, like a 6x8 or a 5x7, would be understandable and adequate. It has taken on many new meanings, but all seem to be positive, or OK. Even though what it's based on would mean 5x5 was mediocre at best.
In two way radio, a call would be, "how do you receive me?", to which if the signal was acceptable, the answer would be, "I read you 5x5."
by teardropper December 16, 2009
 
5.
On track, on course, going where you want to; it also refers to the central point in a targeting scope - five over and five up.
We're on course, 5 x 5.

I've got him in my sights, 5 x 5.
Take him out.
by J Fieth February 23, 2008
 
7.
To get at least 5 in each of the major stat categories in a basketball game; points, rebounds, assists, blocks, and steals.
AK-47 is known for getting 5 x 5's.
by WhiteJordan April 03, 2006