Definition of "sunbonnet"

“Put on your sunbonnet,” she ordered.“Oh, please, Aunt Elizabeth, don’t make me wear that horrid thing.”Aunt Elizabeth, wasting no further words, picked up the bonnet and tied it on Emily’s head. Emily had to yield. But from the depths of the sunbonnet issued a voice, defiant though tremulous.

1923, Lucy Maud Montgomery, “Chapter 8”, in Emily of New Moon

She saw a square picture framed in the window, two whitewashed cottages each with a little winding path, a bed of red and yellow cockscomb, a sloping field, a row of gum-trees, a child in a blue sunbonnet carrying a basket.

1929, M. Barnard Eldershaw, A House Is Built, Chapter VII, Section xi