nigh nigh Posted in N Best definition nigh nigh Shortened and much more addorable version of “goodnight.” Also, to sleep. Nigh nigh Leroy! See you in the morning. -or- It’s time for me to go nigh nigh. How satisfied are you with the definition? Looking for nigh nigh meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 42 times.