2. Noun. Any of several South American palms, of the genus ''Euterpe'', having a dark purple drupe ¹
3. Noun. The fruit of these trees, harvested for their juice ¹
4. Noun. (alternative spelling of açai) ¹
¹ Source: wiktionary.com
Definition of Acai
1. a berry found in the Brazilian rainforest, aka palm berry [n -S]