Covered in mist; foggy.
"The early morning walk through the woods was misty, with a thick white fog hanging over the trees."
A female given name from English, reasonably popular in the 1970s and the 1980s.
"My grandmother's first name was Misty, a popular choice for baby girls during the seventies."
Misty comes from the Old English word mistiġ, which originally meant "dark" or covered in mist. The term entered Middle English with a similar sense of being shrouded in fog and has remained largely unchanged since then.