1. plural of lengthening; instances or processes of making something longer or extending its duration

Examples

• The lengthenings of the school day were unpopular with students.
• Several lengthenings of the project deadline were necessary due to unforeseen delays.
• The tailor made multiple lengthenings to the hem of the dress.
• Lengthenings of vowel sounds occur in certain dialects of English.
• The lengthenings of the bridge construction extended the timeline by months.