verb🔗ShareTo make longer, to extend the length of."To prepare for the marathon, the runner was lengthening her training runs each week. "actionprocessChat with AIVocabulary GamePractice Reading
verb🔗ShareTo become longer."The shadows on the lawn lengthened as the sun began to set."processactiontimeChat with AIVocabulary GamePractice Reading
noun🔗ShareThe process of growing longer."The lengthening of the school day by 30 minutes caused some complaints from students. "processbiologyphysiologyChat with AIVocabulary GamePractice Reading
noun🔗ShareA type of sound change when a sound (especially a vowel) lengthens"The teacher explained that vowel lengthening in some dialects makes words like "pin" and "pen" sound almost the same because the "i" sound stretches out. "phoneticslinguisticssoundlanguageChat with AIVocabulary GamePractice Reading
