A creation is said to be turing-complete when its data manipulation rules (e.g. instruction set in a computer) can be used to simulate any other turing machine.
A turing machine is a mathmatical model of computation (describes how an output is formed by a given input) which can read/write symbols on a strip of paper/tape according to a table of instructions. Turing machines can be used to simulate virturally any algorithm.
Technically yes, if the computer can be used as a turing machine.