bonnet means: While people might refer to all types of hats as “bonnets”, this term usually applies to children and women’s headcoverings that cover the top and back of the head, and tie below the chin. Although bonnet-style headcoverings are less common for women, they can be found for infants and children. The poke bonnet was one of the most striking bonnets in the 19th-century. It featured a high crown with an extremely wide brim, which covered the entire face. (in Fashion Dictionary)

What else does bonnet mean?

Women and children both wear straw or cloth hats. (in Merlin Dictionary)

Cap with a brimless that can be worn by both men and boys. (in Merlin Dictionary)

Removable metal plate that is placed over an machine part such as a valve. (in Merlin Dictionary)

An automobile’s hood. (in Merlin Dictionary)

Windscreen to protect a chimney (in Merlin Dictionary)

Cover for your fireplace. (in Merlin Dictionary)

To increase the sail area, a strip of canvas is laced with a fore and aft sail. (in Merlin Dictionary)

Put a cap on. (in Merlin Dictionary)