Here's how it's used:
* "Fait signe à quelqu'un" - means "makes a sign to someone"
* "Fait signe à quelque chose" - means "signals to something"
Example:
* "Le chauffeur de bus a fait signe à la passagère de monter." (The bus driver signaled to the passenger to get on.)
Note: The verb "faire" (to do, to make) is used here in the third person singular form ("fait"). It implies that the subject is actively performing an action.
Let me know if you have any other French phrases you'd like help with!