Falling prices may be a 'warning sign' of a recession. [=may indicate that a recession is coming]
There were storm 'warnings' [=warnings that a storm was approaching] issued for the area.
I'm giving you 'fair warning' that you had better not discuss politics at dinner tonight.
(..) Because we were having such fun playing with you. Oh, honey. We spent time together. And that's what matters. So is this like a ticket thing or a warning thing? It feels like a warning, right? SARAH: Yeah, we are warned. We are properly warned. (THUNDER RUMBLING) SARAH: Oh, buddy. (..)2016 Storks