beam (biːm) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) |
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| —n |
| 1. | a long thick straight-sided piece of wood, metal, concrete, etc, esp one used as a horizontal structural member |
| 2. | any rigid member or structure that is loaded transversely |
| 3. | the breadth of a ship or boat taken at its widest part, usually amidships |
| 4. | a ray or column of light, as from a beacon |
| 5. | a broad smile |
| 6. | one of the two cylindrical rollers on a loom, one of which holds the warp threads before weaving, the other the finished work |
| 7. | the main stem of a deer's antler from which the smaller branches grow |
| 8. | the central shaft of a plough to which all the main parts are attached |
| 9. | a narrow unidirectional flow of electromagnetic radiation or particles: a beam of light; an electron beam |
| 10. | the horizontal centrally pivoted bar in a balance |
| 11. | informal the width of the hips (esp in the phrase broad in the beam) |
| 12. | a beam in one's eye a fault or grave error greater in oneself than in another person |
| 13. | off beam, off the beam |
| | a. not following a radio beam to maintain a course |
| | b. informal wrong, mistaken, or irrelevant |
| 14. | on the beam |
| | a. following a radio beam to maintain a course |
| | b. nautical opposite the beam of a vessel; abeam |
| | c. informal correct, relevant, or appropriate |
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| —vb |
| 15. | to send out or radiate (rays of light) |
| 16. | (tr) to divert or aim (a radio signal or broadcast, light, etc) in a certain direction: to beam a programme to Tokyo |
| 17. | to pass (data, esp business card details, etc) from one hand-held computer to another by means of infrared beams |
| 18. | (intr) to smile broadly with pleasure or satisfaction |
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| [Old English beam; related to Gothic bagms tree, Old High German boum tree] |
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| beamed |
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| —adj |
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| 'beaming |
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| —adj, —n |
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| 'beamless |
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| —adj |
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| 'beamlike |
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| —adj |
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| 'beamy |
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| —adj |