digital computer

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Computers) a computer that represents information by numerical digits with a fixed number of values; -- most commonly each piece of information is internally represented in binary code, as an array of bits, which are information units each of which can take only two values. The possible values of each bit are conventionally represented as the numbers 1 or 0.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A computing device (computer) that processes signals that change in discrete, quantized, steps; as opposed to an analog computer.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a computer that represents information by numerical (binary) digits