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Not to be confused with the tool known as a straightedge, or the song the subculture takes its name from, Straight Edge. Straight edge (sometimes abbreviated sXe or signified XXX or X) is a subculture of hardcore punk whose adherents refrain from using alcohol, tobacco and other recreational drugs, in reaction to the excesses of punk subculture.
leading edge. n. 1 the forward edge of a propeller blade, aerofoil, or wing. Compare â trailing edge. 2 (Electrical engineering) the part of a pulse signal that has an increasing amplitude. modifier. â¦ leading-edge.