The phrase "overwhelmingly outnumbered" is correct and usable in written English.
You can use it when someone or something is outnumbered by a large number. For example, "The team of eight players was overwhelmingly outnumbered by the opposing team of twenty-five."
If they do they'll be overwhelmingly outnumbered.
The nomads were acutely aware of being a minority overwhelmingly outnumbered by animals.
Despite the rapid growth of their community in the Indonesian islands, the Totok were overwhelmingly outnumbered by the Peranakan Chinese.
The fighters were overwhelmingly outnumbered and outgunned and the revolt never had a real chance of victory, but the fighters held out for a month.
And if not, why not?" When one wonders how the Jews managed to create a country, and why they managed to defend it despite being overwhelmingly outnumbered, the answer is - there was a plan.
It wasn't until I interned at my first national publication that I found myself overwhelmingly outnumbered.
So democrats overwhelmingly outnumber the Taliban in Pakistan, democrats control the state, and the state has a capacity for violence that so far outstrips that of the Taliban as to make any notion of a military balance meaningless.
Certainly, in the case of the Istanbul bill, the point must be made that, while adult female victims of domestic violence overwhelmingly outnumber males, this vote was merely about approving the bill in principle, with the proviso that certain elements would have to be adjusted.
The solvency of Social Security is at risk if the following two things happen: 1) the number of recipients overwhelmingly outnumber the number of contributors and 2) American lawmakers forget how to do math.
Spread across the city, but overwhelmingly present in the Mission District, rioters vastly outnumbered the residents begging them to stop and telling photographers that the people setting couches, trash cans, mattresses and the ride-sharing company Lyft's signature pink mustaches on fire did not represent San Francisco Giants fans.
Most of the Americans in Shanghai were Northerners, but their British neighbors – who outnumbered them 10 to 1 – were overwhelmingly pro-Confederate and had no compunction about saying so, even joking about it.
