1. A long, narrow, flat piece of wood, metal, or plastic with straight edges marked in inches or centimetres, which you use to measure things or to draw straight lines. English = ruler.
2. A person whose job is to prepare technical drawings and plans. English = draftsman, draughtsman.
3. The ability to draw and prepare technical drawings and plans. English = draftsmanship, draughtsmanship.
4. A person who designs buildings; the art of planning, designing, and constructing buildings. English = architect; architecture.