The frame recess or channel that receives and retains the glass, glazing materials, and required clearances.
GlassRenu · Educational illustration
Meaning and boundaries
Pocket depth is not the same as glass bite because edge clearance and tolerances reduce the actual engagement.
Why it matters in glass restoration
Work near the perimeter can contact gaskets, sealants, blocks, weeps, coatings, or edges concealed inside the pocket.