Definition of let in 

(Entry 1 of 2)

1 : to insert or embed in (a surface) lets in diagonal sheathing at each corner of the house

2 : to involve or commit unfavorably the provisions … could still let us in for trouble— Elmer Davis smiled at all her schemes, little dreaming that … she was letting him in for some £20,000— Elizabeth Montizambert

3 : to share information with or allow to participate learned a lot more … and I'll let you in on it— Rex Ingamells

let-in

adjective

Definition of let-in (Entry 2 of 2)

: shortened and widened by the cutting and sewing in of additional pieces used of pelts

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History and Etymology for let in

Adjective

let in

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More from Merriam-Webster on let in

Nglish: Translation of let in for Spanish Speakers

Britannica English: Translation of let in for Arabic Speakers

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