the mind > emotion > love > tenderness > foolish affection, excessive love or fondness > [noun] > one showing excessive fondness (4)
A person who bestows affection, care, or attention on a person or thing extravagantly, excessively, or uncritically. Frequently with on.
A person who dotes (on or upon a person or thing). Obsolete.
figurative. One who is inordinately fond of some specified object or pursuit, esp. a glutton of books, after Latin helluo librorum. Also const. for.