劣化の定義と意味 - メリアム・ウェブスター

DEGRADATION Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition Definition Synonyms Example Sentences Word History Rhymes Entries Near Cite this Entry Citation Kids Definition Kids Medical Definition Medical More from M-W Show more Show more Citation Kids Medical More from M-W Save Word To save this word, you'll need to log in. Log In degradation noun deg·​ra·​da·​tion ˌde-grə-ˈdā-shən Synonyms of degradation 1 : the act or process of degrading environmental degradation the gradual degradation of organic matter suffer the degradations of poverty and abuse 2 a : decline to a low, destitute, or demoralized state 'A dependence upon him,' said Kate, 'would embitter my whole life. I should feel begging a far less degradation .' — Charles Dickens Some houses are found spotless, others in a wretched degradation … — Paul Reyes b : moral or intellectual decadence : degeneration … educated him in the bestiality and degradation that war brings. — Drew Middleton degradative ˈde-grə-ˌdā-tiv adjective Synonyms of degradation Relevance deterioration decline declination See All Synonyms & Antonyms in Thesaurus Examples of degradation in a Sentence English teachers bemoaning the degradation of the language that e-mail and instant messaging have allegedly brought about. the belief that moral degradation is an unmistakable sign of a nation in decline 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 . The concept of high-fidelity sound reproduction has been around since the 1930s and denotes a sound system with no distortion or degradation in quality. — Nathanael Gassett, Bon Appetit Magazine , 30 Apr. 2026 Among their concerns with the project, opponents worry the development will bring unsafe traffic congestion around the nearby elementary school and environmental degradation to the surrounding area. — Stephen Hobbs, Sacbee.com , 30 Apr. 2026 Slowing degradation pathways The researchers also found that chlorine changes how the material degrades. — Aamir Khollam, Interesting Engineering , 30 Apr. 2026 Farmers around the world are at a critical tipping point, facing mounting challenges such as soil degradation , water scarcity, and increasingly unpredictable weather. — Angela Velasquez, Footwear News , 28 Apr. 2026 See All Example Sentences for degradation Word History Etymology see degrade First Known Use circa 1535, in the meaning defined at sense 1 Time Traveler The first known use of degradation was circa 1535 See more words from the same year Rhymes for degradation abdication aberration abjuration abnegation abrogation acceptation acclamation acclimation accusation activation actuation acylation See All Rhymes for degradation Browse Nearby Words degradable degradation degradational See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Degradation.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/degradation. Accessed 5 May. 2026. Copy Citation Kids Definition degradation noun deg·​ra·​da·​tion ˌdeg-rə-ˈdā-shən 1 a : a reduction in rank, dignity, or standing b : removal from office 2 : loss of honor or reputation 3 : degeneration sense 1 , deterioration Medical Definition degradation noun deg·​ra·​da·​tion ˌdeg-rə-ˈdā-shən : change of a chemical compound to a less complex compound degradative ˈdeg-rə-ˌdāt-iv adjective More from Merriam-Webster on degradation Nglish: Translation of degradation for Spanish Speakers Last Updated: 3 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