What is Check Back in Poker?

A check back, or “checking back” is checking when you’re last to act and your opponent or opponents check to you.

The solver checks quite a bit with various made hands and draws for board coverage on various runouts. Humans tend to do less checking back, draws are a good example of this. 

Article: Your Opponent Checked Back—Here’s How to Capitalize (Part I)
Related poker terms: capped range, pot control , equity realization