| n. | 1. | (Bot.) A genus of trees (Celtis) related to the elm, but bearing drupes with scanty, but often edible, pulp. Celtis occidentalis is common in the Eastern United States. |
| Noun | 1. | hackberry - any of various trees of the genus Celtis having inconspicuous flowers and small berrylike fruits Synonyms: nettle tree |
| 2. | hackberry - small edible dark purple to black berry with large pits; southern United States Synonyms: sugarberry |