As a Noun: 1. A written announcement which is put in a place, usually a wall or vertical surface, where it can be read by everyone. English = notice. 2. Short nails with broad, fat tops, which you use for attaching papers to a wall or vertical surface. English = drawing pins, thumb tacks. As a Verb or Adjective: 1. To put up a written announcement, usually on a wall or vertical surface, where it can be read by everyone. 2. To press short nails, with broad, flat tops, into a wall or vertical surface, usually to hold up a written announcement or picture. English = pin up, press in drawing pins.