eavesdropping

verb
  1. 1

    To hear a conversation one is not intended to hear; to listen in.

    โ€œI hope nobody was eavesdropping on our conversation last night, since it got so personal.โ€

  2. 2

    To listen for another organism's calls, so as to exploit them.

Synonyms

noun
  1. 1

    Listening secretly to private conversation of others.

  2. 2

    The interception of electronic communication.

  3. 3

    The act of one organism listening for another's calls, so as to exploit them.

Source: https://en.wiktionary.org/wiki/eavesdrop, https://en.wiktionary.org/wiki/eavesdropping