I. ˌin-tər-ˈlīn transitive verb
Etymology: Middle English enterlinen, from Medieval Latin interlineare, from Latin inter- + linea line
Date: 15th century
: to insert between lines already written or printed
• in·ter·lin·e·a·tion -ˌli-nē-ˈā-shən noun
II. transitive verb
Etymology: Middle English, from inter- + linen to line
Date: 15th century
: to provide (a garment) with an interlining
III. adjective
Date: 1897
: relating to, involving, or carried by two or more transportation lines