adjective, -er, -est, adverb, noun, plural greats, (especially collectively
) great, interjection | 1. | unusually or comparatively large in size or dimensions: A great fire destroyed nearly half the city. |
| 2. | large in number; numerous: Great hordes of tourists descend on Europe each summer. |
| 3. | unusual or considerable in degree, power, intensity, etc.: great pain. |
| 4. | wonderful; first-rate; very good: We had a great time. That's great! |
| 5. | being such in an extreme or notable degree: great friends; a great talker. |
| 6. | notable; remarkable; exceptionally outstanding: a great occasion. |
| 7. | important; highly significant or consequential: the great issues in American history. |
| 8. | distinguished; famous: a great inventor. |
| 9. | of noble or lofty character: great thoughts. |
| 10. | chief or principal: the great hall; his greatest novel. |
| 11. | of high rank, official position, or social standing: a great noble. |
| 12. | much in use or favor: “Humor” was a great word with the old physiologists. |
| 13. | of extraordinary powers; having unusual merit; very admirable: a great statesman. |
| 14. | of considerable duration or length: We waited a great while for the train. |
| 15. | Informal.
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| 16. | being of one generation more remote from the family relative specified (used in combination): a great-grandson. |
| 17. | Informal. very well: Things have been going great for him. |
| 18. | a person who has achieved importance or distinction in a field: She is one of the theater's greats. |
| 19. | great persons, collectively: England's literary great. |
| 20. | (often initial capital letter ) greats, (used with a singular verb ) Also called great go. British Informal.
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| 21. | (used to express acceptance, appreciation, approval, admiration, etc.). |
| 22. | (used ironically or facetiously to express disappointment, annoyance, distress, etc.): Great! We just missed the last train home. |
| 23. | great with child, being in the late stages of pregnancy. |

great (grāt) adj. great·er, great·est
Very well: got along great with the teacher. [Middle English grete, from Old English grēat, thick, coarse.] great'ly adv., great'ness n. |
" 'The Great War' -- as, until the fall of France, the British continued to call the First World War in order to avoid admitting to themselves that they were now again engaged in a war of the same magnitude." [Arnold Toynbee, "Experiences," 1969]
great
In addition to the idioms beginning with great, also see good (great) deal; good (great) many; go to any length (great lengths); have a good (great) mind to; make great strides; no great shakes; set (great) store by.