a protective covering that keeps things out or hinders sight

a window blind made of horizontal strips that overlap when closed

an opaque window blind that can cover or uncover a window

a window blind consisting of a length of material which, when drawn up, gathers into horizontal folds from the bottom.

a window blind that consists of a series of thin slats that hang in front of a window, which can be turned as a group close with a slight overlap to block the window.