1. A curtain or drape, especially one used as a room divider or window covering.
Usage: Primarily used in Spanish-speaking contexts or in English when referring to theatrical or architectural curtains; less common in everyday American English.
2. In anatomy, a sheath or membrane-like structure that partially covers or encloses an organ or part.
Usage: Technical/medical term

Examples

• The theater's heavy cortina fell dramatically at the end of the performance.
• She hung a cortina across the window to block the afternoon sun.
• The cortina of the mushroom partially covered the gills underneath.
• A decorative cortina separated the living room from the dining area.
• The doctor explained that the cortina was a protective layer in the eye.