Top Definition

1. Something impossible to measure.

2. Something impossible to understand because of being very mysterious or complicated.

1. Unfathomable ocean depths.
2. How life was created is unfathomable.
by Jafje September 16, 2007

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×