1. (

• lengthen ,

) make longer; "Lengthen this skirt, please" ;

2. (

• lengthen

) become long or longer; "In Spring, the days lengthen" ;

1. (

• elongated ,
• extended ,
• lengthened ,
• prolonged

) drawn out or made longer spatially; "Picasso's elongated Don Quixote"; "lengthened skirts are fashionable this year"; "the extended airport runways can accommodate larger planes"; "a prolonged black line across the page" ;