Switch places is an idiom that means to exchange positions or roles with someone else. The two crossword solutions for this term are ONS (3 letters) and OFFS (4 letters). ONS stands for 'on switch, ' which is a device used to turn something on or off, while OFFS stands for 'off switch, ' which is a device used to turn something off. Both terms refer to the act of exchanging positions or roles with someone else.