What is the meaning of the word "analogue"?

Definitions:

  1. of a circuit or device having an output that is proportional to the input copy to clipboard adjective
    • This analogue device picks up radio signals from all over the world. copy to clipboard
  2. something having the property of being analogous to something else copy to clipboard noun
    • That argument is an analogue of the one we just proved wrong. copy to clipboard