Definition of "crosstalk"

(electronics) Undesirable signals from a neighbouring transmission circuit; undesired coupling between circuits.  examples

(biology) The situation where one or more components of a signal transduction pathway affect another pathway.

Conversation that is incidental to the topic under discussion.  examples

A traditional Chinese comedic performance in the form of a dialogue.  examples

Communication between parties who have extremely different perspectives.  quotations  examples

To hold an incidental conversation  examples