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Five by five is a radio communications expression that means 'loud and clear'. One of the fives represents the S units of reception strength. The other five is a rating of the signal clarity. Five by five is a good, clear signal. The radio use of this expression goes back to the 1950s: "'All right, testing, one-two-three-four. . .' 'Five by five, Mr. Holloran!'" (Hunter, Blackboard Jungle, 1954).

The more metaphorical meaning, popularized by Faith Lehane from the television show Buffy the Vampire Slayer, wasn't recorded until the 1980s.

The use of the word is primarily used in the military, or when discussing something similar.
"'I hope everything's all right.'
'Yeah, everything is five by five'"
by 5by5 July 03, 2005
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Loud and clear. From military erminology. Old radios had two readings. Loudness and clarity rated from 0-5. Thus five by five means literally loud and clear.
How's my signal?

Five by five.
by huddaddy September 10, 2003
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Term meaning everything is OK.

The term comes from old radio slang. When communicating over radio, the operator would report the strength and clarity of the signal on a scale of 1 to 5 each. Therefore, if a radio operator described the signal as "five by five" it meant it was both loud and clear.
I don't use the phrase "five by five" because they use it on Buffy.
by SpeedoMask August 11, 2003
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A term used by Faith on Buffy, to discribe a situation as ok.
I'm feeling five by five
by jayde September 15, 2004
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Means " Things are OK"
"Five by five" was used in the film "Aliens" by the pilot during the dropship descent to LV-426 to denote that they were on course
by tonyhippy December 14, 2011
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Originally an aeronautical term that is the equivalent to the modern "Loud & Clear". In slang usage, it means "great, fine"; popular in New England, it was made famous in "Buffy: the Vampire Slayer" from its overuse by the rogue slayer Faith.
"No worries, B. That vamp tried to kill us but I got mad skills. We're five-by-five here."
by Sikozu Sta.-Ána September 03, 2003
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a term used in the military to say everything is in order. another way of saying squared away or ship shape.
"Is everything in order?"
"Everything is five by five"
by rickysayshi January 01, 2009
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