There are 2 definitions of interline in English:

interline1

Syllabification: in·ter·line
Pronunciation: /ˌin(t)ərˈlīn
 
/

verb

[with object]
Insert words between the lines of (a document or other text): the writing was overwritten and interlined by many hands

Origin

late Middle English: from medieval Latin interlineare, from inter- 'between' + Latin linea 'line'.

Definition of interline in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose

There are 2 definitions of interline in English:

interline2

Syllabification: in·ter·line
Pronunciation: /ˌin(t)ərˈlīn
 
/

verb

[with object]
Put an extra lining between the ordinary lining and the fabric of (a garment, curtain, etc.), typically to provide extra strength.

Definition of interline in: