a stoppage or slowing of motion, work, or the like, due to obstruction, overloading, malfunction, or inefficiency; jam: Your letters didn't go out yesterday because there was a jam-up in the mail room.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.