/əˈkjuːmjəˌleɪtɪd ˈdɛfɪsɪt/ – Noun
Definition: Số lỗ tích luỹ.
A more thorough explanation: the amount of net loss a business has for a particular year in which the business shows a negative amount in its retained earnings (=profit)
Example: The company reports an accumulated deficit of $123. 8 million as of June this year.