adj.1. Having no bottom.
2. Too deep to be measured: a bottomless glacial lake.
3. Difficult or impossible to understand; unfathomable: one of the bottomless mysteries of life.
4. Having no limitations or bounds; limitless: a bottomless supply of money.
5. a. Nude, especially unclothed below the waist: bottomless dancers.
b. Featuring such dancers as entertainment: bottomless bars.