American Sign Language: "principle"
The sign for principle, (as in a guiding rule) is similar to signs such as "rule" or "law" that are done on the palm of non-dominant hand.
Hold up your non-dominant "flat-hand" with the palm facing outward and the fingers pointing upward (as if representing a piece of paper.
Touch the thumb-side of your dominant "P" hand the flat upper finger area of the non-dominant hand and then pull the "P-hand" off of the palm a bit as you make a small downward arc with the "P" hand and touch the lower part of the palm.
PRINCIPLE:
Here is an example of another signer "Sean Benson, single, Deaf, early 30's" doing the sign for "principle."
Note: The sign PRINCIPLE doesn't mean "principal." If you mean "principal" (as in the guy who is in charge of the school) then see: PRINCIPAL
Notes: