NULLの定義と意味 - メリアム・ウェブスター

NULL Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition adjective noun verb adjective 3 adjective noun verb Did you know? Synonyms Example Sentences Word History Phrases Containing Rhymes Entries Near Podcast Cite this Entry Citation Kids Definition Kids Legal Definition Legal More from M-W Show more Show more Citation Kids Legal More from M-W Save Word To save this word, you'll need to log in. Log In null 1 of 3 adjective ˈnəl Synonyms of null Take our 3 question quiz on null 1 : having no legal or binding force : invalid a null contract Take our 3 question quiz on null 2 : amounting to nothing : nil The null uselessness of the wireless transmitter that lacks a receiving station … ? — Fred Majdalany 3 : having no value : insignificant … news as null as nothing … — Emily Dickinson 4 a : having no elements (see element sense b(3) ) null set b : having zero as a limit null sequence c of a matrix : having all elements equal to zero 5 a : indicating usually by a zero reading on a scale when a given quantity (such as current or voltage) is zero or when two quantities are equal — used of an instrument b : being or relating to a method of measurement in which an unknown quantity (as of electric current) is compared with a known quantity of the same kind and found equal by a null detector 6 : of, being, or relating to zero The meter gave a null reading. 7 : zero sense 1c Quiz: Which word is closest in meaning to null ? null 2 of 3 noun 1 : zero sense 3a(1) 2 a : a condition of a radio receiver when minimum or zero signal is received b : a minimum or zero value of an electric current or of a radio signal null 3 of 3 verb nulled ; nulling ; nulls transitive verb : to make null Did you know? Let’s be honest: null is kind of a nothing word. That’s not a judgment—it was literally borrowed into English from the Anglo-French word nul , meaning "not any." That word, in turn, traces to the Latin word nullus , from ne- , meaning "not," and ullus , meaning "any." Null often pops up in legal and scientific contexts; it was originally used in Scottish law and still carries the meaning "having no legal or binding force," especially in the phrase "null and void." In mathematics, it is sometimes used to mean "containing nothing"; for example, the set of all whole numbers that are divisible by zero is the "null set" (that is, there are no numbers that fit that description). Null is occasionally seen in non-technical contexts with the meaning "lacking meaning or value," as in "if no one reads it, the book's content is null." Synonyms of null Relevance Adjective void invalid Verb abolish repeal cancel void avoid invalidate See All Synonyms & Antonyms in Thesaurus Examples of null in a Sentence Adjective the contract was null because one party forgot to sign it that information is as null as no information at all Verb asked the state court to null the election results because of widespread voting irregularities Word History Etymology Adjective, Noun, and Verb Anglo-French nul , literally, not any, from Latin nullus , from ne- not + ullus any; akin to Latin unus one — more at no , one First Known Use Adjective 1542, in the meaning defined at sense 1 Noun 1605, in the meaning defined at sense 1 Verb 1556, in the meaning defined above Time Traveler The first known use of null was in 1542 See more words from the same year Phrases Containing null aleph - null null and void null hypothesis null - space Rhymes for null cull dull gul gull lull ndebele scull skull stull trull tulle seagull See All Rhymes for null Browse Nearby Words nul null nulla See all Nearby Words Podcast Get Word of the Day delivered to your inbox! Sign Up Cite this Entry Style MLA Chicago APA Merriam-Webster “Null.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/null. Accessed 6 May. 2026. Copy Citation Kids Definition null adjective ˈnəl 1 : having no legal or binding force : invalid 2 : having no value : insignificant 3 : having no elements the null set Legal Definition null adjective ˈnəl : having no legal or binding force : void a null contract Etymology Adjective Anglo-French nul , literally, not any, from Latin nullus , from ne- not + ullus any More from Merriam-Webster on null Nglish: Translation of null for Spanish Speakers Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged More from Merriam-Webster Word of the Day flamboyant See Definitions and Examples » Get Word of the Day daily email! 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