a short strip of material attached to or projecting from something in order to facilitate opening or identifying or handling it; "pull the tab to open the can"; "files with a red tab will be stored separately"; "the collar has a tab with a button hole"; "the filing cards were organized by cards having indexed tabs"
a formal written offer to sell securities (filed with the SEC) that sets forth a plan for a (proposed) business enterprise; "a prospectus should contain the facts that an investor needs to make an informed decision"