We found one dictionary that defines the word at that time:

Opposite: then, afterward, later, subsequently Phrases: at that point in time, at that time and before, at that particular time, current at that time when it happened, more... ▸ Words similar to at that time ▸ Usage examples for at that time ▸ Idioms related to at that time ▸ Wikipedia articles (New!) ▸ Words that often appear near at that time ▸ Rhymes of at that time ▸ Invented words related to at that time