noun
(chiefly Canada, US, Philippines, India) An absorbent garment worn around the crotch that retains the wearer's urine and feces, often worn by a baby or young child who is not yet toilet trained, or by an adult who is incontinent or wets the bed, or under extreme working conditions without access to a toilet; a nappy.
(historical) A textile fabric having a repeating pattern, especially of diamonds or flowers, formed by alternating directions of thread.
(chiefly Canada, US, colloquial, sometimes humorous) Something that absorbs and collects (retains) liquid or waste material, much like a diaper (noun, sense 1).
(Canada, US, colloquial, humorous, possibly derogatory) A piece of clothing that resembles the shape of a diaper (noun, sense 1) but lacks the absorbency.
(art, chiefly architecture, decorative arts, embroidery) A repeating geometrical or (often stylised) floral pattern, usually of small diamonds evenly spaced, that decorates a flat surface, sometimes in bas-relief; diaperwork.
(heraldry, chiefly historical) A repeating geometrical or floral pattern, used to cover the surface of a shield and forming the ground for any charges.
(obsolete) A towel, napkin or tablecloth made from the diaper fabric (noun, sense 2).
verb
To put diapers on someone.
To draw flowers or figures, as upon cloth.