fitted sheet

Noun

 * 1) A  tailored to form pocket for a mattress with  edges that is suitable for a range of  sizes. The edge may also contain a drawstring to secure the sheet more firmly and enable use on a wider range of mattress thicknesses.

Antonyms
1.A flat sheet of material that can be used as a covering on top of your body to cover yourself while you sleep in hotels and during the summer to cover the mattress base.

Translations

 * Chinese:
 * Mandarin: 床墊套, 床墊罩
 * Dutch:
 * Finnish: muotoiltu aluslakana
 * French:
 * German: Spannbettlaken,
 * Icelandic: teygjulak
 * Polish: prześcieradło z gumką
 * Spanish: sábana ajustable