adj. 1. As yet unexplained, or too complicated to explain; compare automagically and (Arthur C.) Clarke's Third Law "Any sufficiently advanced technology is indistinguishable from magic." "TTY echoing is controlled by a large number of magic bits." "This routine magically computes the parity of an 8-bit byte in three instructions." 2. Characteristic of something that works although no one really understands why (this is especially called black magic). 3. [Stanford] A feature not generally publicized that allows something otherwise impossible, or a feature formerly in that category but now unveiled. Compare {black magic}, wizardly, deep magic, heavy wizardry. For more about hackish `magic', see A Story About `Magic' (in appendix A).