So when Mr. Trump ducked out to dinner Tuesday night without informing the journalists assigned to cover him, it struck White House reporters as a small but significant omen that cordial relations between the president and his press corps, a hallmark of the West Wing, were under threat.
I have trouble understanding this. COBUILD Advanced English Dictionary. Copyright © Harper Collins Publishers says that if you duck out of something that you are supposed to do, you avoid doing it.
George ducked out of his forced marriage to a cousin.
And The Cambridge Advanced Learner’s Dictionary & Thesaurus lists this example:
You can't duck out of your responsibilities.
However, I don't think the meaning of the verb as used in by the NY Times is the same. Is there some other meaning that's not in the dictionaries?