A regularly-shaped slab of clay or other material, affixed to cover or decorate a surface, as in a roof-tile, glazed tile, stove tile, carpet tile etc.
A rectangular graphic.
Any of various flat cuboid playing pieces used in certain games, such as dominoes, Scrabble, or mahjong.
A stiff hat.
To cover with tiles.
To arrange in a regular pattern, with adjoining edges (applied to tile-like objects, graphics, windows in a computer interface).
To optimize (a loop in program code) by means of the tiling technique.
To protect from the intrusion of the uninitiated.