the act of giving the main facts and not the details about something, or something that gives these main facts

I admit that my adumbration of yesterday's meeting was scant. 我承认，我对昨天的会议所做的概括很不充分。

The "people's budget" of 1909 was an early adumbration of the British welfare state. 1909年的“人民预算”是英国福利国家的一个早期雏形。