Telltale signs are clues or indicators that can be used to identify something. AROMAS, ODORS, and OMENS are all examples of telltale signs. AROMAS are pleasant smells that can be used to identify a particular food or place. ODORS are unpleasant smells that can be used to identify a particular person or thing. OMENS are supernatural signs that can be used to predict the future. All three of these telltale signs can be used to identify something or someone.