INFORM

v. 1 tell, apprise, advise, communicate, enlighten, notify, acquaint, brief; impart, disclose, divulge, reveal, report, Colloq tip (off) I have informed everyone about the storm warning 2 Usually, inform against or on. betray, incriminate, implicate, identify, Colloq tell (on), blab (on), rat (on), US blow the whistle (on); Slang peach (on), snitch (on), squeal (on), put the finger on, sing, name names, Brit nark (on), grass (on), split on, US finger He informed on his accomplices in return for a lighter sentence