A door that opens and closes by sliding to the side; sometimes one of a pair.(noun)
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Use "sliding door" in a sentence
"Early on the third morning I aroused Fritz, and directed him to ascend the rope ladder, and arrange a cord on the sliding door of the dove-cot, by which it could be opened or closed from below."
"Holding his bottle of Courvoisier, Sexton wandered toward the sliding door of his balcony."
"Bracing her back and her feet, she shoved open the heavy sliding door until gray light flooded the space."