Definition of 二十歳 (はたち)
二十歳
はたち
hatachi
Common word
noun
1.
20 years old
2.
twenty(archaism)(only relevant for 二十 and 廿)
Other readings:
                20歳【はたち】
、二十【はたち】
、廿【はたち】
                Related Kanji
| 二 | two, two radical (no. 7) | 
| 十 | ten | 
| 歳 | year-end, age, occasion, opportunity | 
| 廿 | twenty |