Definitions for "Rod pocket"
A pocket or casing sewn across the top (and sometimes bottom) of a curtain panel through which a rod is inserted. Generally, the pocket should measure 1/2" to 1" larger than the rod.
A sleeve running across the top or bottom of a drapery through which a rod is inserted.
Drapes with a hollow sleeve at the top and sometimes at the bottom to allow a rod to slide through for gathered treatments.