Definitions for "FITTED SHEET"
Sheet with elasticized edges enabling it to be easily placed over the mattress and stay in place.
Sheet used to tightly fit over your mattress. Bottom sheet. Fitted sheets usually have the corners with some elastic sewn around the edges. The cheaper versions will feature elastic on only 2 sides, while better quality fitted sheets will have elastic all the way around the bed. Helps keep that sheet on the bed so you don't wake up on the floor.
Also called the "bottom sheet." A fitted sheet fits snugly around the mattress.
Keywords:  perfectly, simple, job, device, one
a simple device and this one does the job perfectly