adj. Of, relating to, or resembling a digit, especially a finger.adj. Operated or done with the fingers: a digital switch. adj. Having digits.adj. Expressed in numerical form, especially for use by a computer.adj. Computer Science Of or relating to a device that can read, write, or store information that is represented in numerical form. See Usage Note at virtual.adj. Using or giving a reading in digits: a digital clock. n. A key played with the finger, as on a piano.