have something on good authority

To know from a reliable source (that).

Japanese Meaning

信頼のおける情報筋によって知っている / 信用できる情報源から事実として知っている

I have something on good authority that the meeting has been postponed until next week.

信頼できる情報筋から、会議が来週に延期されたと聞いています。

Sense（1）

To know from a reliable source (that).

have it on good authority that …

has something on good authority

（ present singular third-person ）

having something on good authority

（ participle present ）

had something on good authority

（ participle past ）

had something on good authority

（ past ）