The phrase "explicitly opposed" is correct and can be used in written English.
It means to be openly or directly against something or someone. Example: The senator's views were explicitly opposed by the majority of her colleagues, causing tension within the political party.
Like all other civil liberty campaigners, the BMF has been strongly and explicitly opposed to the proposal.
But it is also explicitly opposed to the idea that we can rely on purely technological solutions to ecological problems.
In the party's recent platforms, they have explicitly opposed urban investment – or what they call "social engineering" – on transit and housing.
Although Tajfel conducted experimental research and encouraged others to do the same, his goals were more ambitious, and he was explicitly opposed to reductionism in social psychological theory.
We now have an unelected prime minister who has explicitly opposed the view of the referendum majority, but undertakes to honour its view.
Germany, however, has explicitly opposed any military action against Iran, while Britain and France, like the United States and Israel, have refused to rule out military action.
Whatever his caveats, Mr. Clinton did not explicitly oppose the Iraq war from the beginning.
The SNP takes a similar line, explicitly opposing a return to the snoopers' charter.
While not explicitly opposing it, Mr. Schwarzenegger said it smacks of changing the rules "in the middle of the game".
Leibniz, a later philosopher who also followed this general line of thought, began by explicitly opposing souls to material things.
In addition, the money could not "provide assistance to any group or organization that does not have a policy explicitly opposing prostitution and sex trafficking".
