<p><strong>Adjective</strong></p><ul><li>greater, greatest.</li><li>unusually or comparatively large in size or dimensions: A great fire destroyed nearly half the city.</li><li>large in number; numerous: Great hordes of tourists descend on Europe each summer.</li><li>unusual or considerable in degree, power, intensity, etc.: great pain.</li><li>wonderful; very good; first-rate: We had a great time. That's great!</li><li>being such in an extreme or notable degree: great friends; a great talker.</li><li>exceptionally outstanding; notable; remarkable: a great occasion.</li><li>highly significant or consequential; important: the great issues in American history.</li><li>distinguished; famous: a great inventor.</li><li>of noble or lofty character: great thoughts.</li><li>chief or principal: the great hall; his greatest novel.</li><li>of high rank, official position, or social standing: a great noble.</li><li>much in use or favor: “Humor” was a great word with the old physiologists.</li><li>of extraordinary powers; having unusual merit; very admirable: a great statesman.</li><li>of considerable duration or length: We waited a great while for the train.</li><li>enthusiastic about some specified activity (usually followed by at, for, or on): He's great on reading poetry aloud.</li><li>skillful; expert (usually followed by at or on): He's great at golf.</li><li>being of one generation more remote from the family relative specified (used in combination): a great-grandson.</li></ul><p><strong>Adverb</strong></p><ul><li>Informal: very well: Things have been going great for him.</li></ul><p><strong>Noun</strong></p><ul><li>greats (plural), (especially collectively) great.</li><li>a person who has achieved importance or distinction in a field: She is one of the theater's greats.</li><li>great persons, collectively: England's literary great.</li><li>(often initial capital letter) greats (used with a singular verb): Also called great go.</li><li>British Informal: the final examination for the bachelor's degree in the classics and mathematics, or Literae Humaniores, especially at Oxford University and usually for honors.</li><li>the course of study.</li><li>the subject studied.</li></ul><p><strong>Interjection</strong></p><ul><li>(used to express acceptance, appreciation, approval, admiration, etc.) (used ironically or facetiously to express disappointment, annoyance, distress, etc.): Great! We just missed the last train home.</li></ul>