Definition of 在りし日 (ありしひ)
あひ
                        在りし日
ありしひ
arishihi
Common word
noun, no-adjective
1.
past days, bygone days, days of yore, the olden days
no-adjective, noun
2.
while still alive, during one's lifetime
Other readings:
                ありし日【ありしひ】
                Related Kanji
| 在 | exist, outskirts, suburbs, located in | 
| 日 | day, sun, Japan, counter for days |