未定義の定義と意味 - メリアム・ウェブスター

UNDEFINED Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition Definition Synonyms Example Sentences Word History Rhymes Entries Near Cite this Entry Citation Save Word To save this word, you'll need to log in. Log In undefined adjective un·​de·​fined ˌən-di-ˈfīnd Synonyms of undefined Take our 3 question quiz on undefined : not defined : such as a : not clearly or precisely shown, described, or limited undefined rules undefined powers a vague, undefined feeling of dread … the true outlines of Clinton's foreign policy remain undefined . — William Greider b : not provided with a definition an undefined dictionary entry Take our 3 question quiz on undefined Synonyms of undefined Relevance vague faint See All Synonyms & Antonyms in Thesaurus Examples of undefined in a Sentence plagued by undefined worries that kept her awake at night Recent Examples on the Web Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback . Create zones that give your patio a purpose The most functional patios don’t try to do everything in one undefined space. — Lauren Jarvis-Gibson, Sacbee.com , 30 Apr. 2026 Taken together, these disparate elements have created a new realm of media players that remains largely undefined . — Caitlin White, Variety , 29 Apr. 2026 Texas regulators flagged dozens of deficiencies in Camp Mystic's emergency plan, saying missing flood maps, unclear evacuation procedures and undefined staff roles could hinder responses during disasters or medical emergencies. — Doug Myers, CBS News , 24 Apr. 2026 Sid Vangala, senior AI systems engineer and architect at MasTec, said the industry is entering an era where responsibility boundaries are completely undefined . — Arthur Zaczkiewicz, Footwear News , 20 Apr. 2026 See All Example Sentences for undefined Word History First Known Use 1611, in the meaning defined above Time Traveler The first known use of undefined was in 1611 See more words from the same year Rhymes for undefined aligned alined assigned behind combined confined consigned declined defined designed divined enshrined See All Rhymes for undefined Browse Nearby Words undefinable undefined undeflected See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Undefined.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/undefined. Accessed 5 May. 2026. Copy Citation Last Updated: 2 May 2026 - Updated example sentences 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 augur See Definitions and Examples » Get Word of the Day daily email! Popular in Grammar & Usage See More More Commonly Mispronounced Words 5 Verbal Slip Ups and Language Mistakes Is that lie 'bald-faced' or 'bold-faced'? The Difference Between 'i.e.' and 'e.g.' Why is '-ed' sometimes pronounced at the end of a word? See More Popular in Wordplay See More The Longest Long Words List 9 Other Words for Beautiful The Words of the Week - May 1 Was 'nervous Nellie' a Real Person? 12 Lovely and Unusual Words for the Natural World See More Popular See More More Commonly Mispronounced Words The Longest Long Words List 9 Other Words for Beautiful See More Games & Quizzes See All Quordle Can you solve 4 words at once? Play Blossom Pick the best words! Play The Missing Letter A daily crossword with a twist Play Name That Tree! A quiz that’s all bark, no bite. Take the quiz See All