1) a barrier of objects (e.g. sacks of sand) put in front of something as a defence (barricade)

2) an instrument with lenses for both eyes, making distant objects seem nearer (binoculars)

3) an instrument used for measuring the diameter of round objects or the inside measurement of tubes etc (callipers)

4) (to make) a short, sharp sound of flat objects struck together (clack)

5) a straight, iron bar, often with a forked end, used as a lever for moving heavy objects (crowbar)

6) (of machinery, systems, objects etc) of, worked by, capable of producing, electricity (electric)

7) an object or collection of objects showing publicity, e.g. in a museum (exhibit)

8) a thin coating or covering; a series of photographs that is shown quickly on a screen so that the people, objects etc in them appear to be moving (film)

9) a place where metal or glass is melted and shaped into objects (foundry)

10) the force of attraction between any two objects, especially that force which attracts objects towards the centre of the earth; the quality of being serious, dangerous etc (gravity)