Definitions
1.nounA large tent with open sides, used for outdoors entertainment.
2.nounA projecting canopy over an entrance, especially one with a sign that displays the name of the establishment or other information of it.
3.noun(by generalization) Lights that turn on and off in sequence, or scrolling text, as these are common elements on a marquee.
4.nounA banner on a web page displaying text that scrolls horizontally.
5.nounIn graphical editing software, a special selection tool, used to highlight a portion of an image."Rectangular Marquee Tool"
6.verbTo select (an object or region) with the marquee selection tool.
7.adjectiveMost famous; preeminent.