- See under kissing kin.
- something closely related or very similar: a textile that is a kissing cousin to nylon.
Origin of kissing cousin
- any more or less distant kin familiar enough to be greeted with a kiss, as a cousin (kissing cousin).
Idioms and Phrases with kissing cousins
Two or more things that are closely akin or very similar. For example, They may be made by different manufacturers, but these two cars are kissing cousins. This metaphoric term alludes to a distant relative who is well known enough to be greeted with a kiss. [c. 1930]