under the radar

Definition

Without attracting notice; in an undetected or secretive manner.

Etymology

An allusion to flying an airplane at an altitude too low for radar detection.

Example Sentences

• "Institutional change has not happened. But it's done quietly under the radar at lots of places."
• "Look, we keep our hand in with Maitland as well as this Partick thing. But we do it under the radar."