To me, it's simple, a foreign army enters your country in violation of your sovereignty? That's an invasion.
They kidnapped the president, lmao, what else could be more against the sovereignty of a nation.
Vague everyday language is unsuitable for contracts. When there are multiple reasonable interpretations, it's impossible to know what has been agreed. It's better to be pedantic and use precise language and narrow technical definitions of words.
Try to "aschkually" a judge irl and you'll find out. Hilarious.
In this particular case, the bets were clearly about military operations with the intention to take control of Venezuelan territory. This is the established meaning of "invasion", in contexts where people care about distinguishing between different types of military operations. But because people could plausibly interpret the word in a different way, the rules did not use words "invade" or "invasion" at all.