Idiom: Tie the knot Posted on 25th October 201824th October 2018 by DoubleClick Tie the knot: to get married Example: We have been dating for quite a long time now and are planning to tie the knot a few months from now. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Posted in Idiom and tagged Idiom T.