That’s not the only definition of a coup or coup attempt. You mind is way too limited to function properly in the modern age,
Technically, what Trump attempted is what’s known as a “self-coup” and Trump isn’t the first leader to try it. Charles Louis Napoleon Bonaparte (nephew of the first Napoleon) pulled one off in France in December 1851 to stay in power beyond his term. Then he declared himself Emperor, Napoleon III. More recently, Nicolas Maduro perpetrated a self-coup in Venezuela after losing the 2017 elections.
What Trump tried is called a “self-coup,” and he did it in slow motion and in plain sight.
www.politico.com