verb (used with object), verb (used without object)
1.
to study too much or too hard (sometimes used reflexively): to overstudy a letter for hidden meanings; to overstudy to the point of exhaustion; to overstudy oneself and forget half of what has been read.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.