Firm in allegiance to a person or institution. (adjective)
Faithful to a person or cause. (adjective)
Examples of word loyal
Their capacity to love wholly, and unquestionable, and remain loyal is beyond any animal; indeed, in many cases, it is beyond many humans.
All of the above being said in the original meaning of the term loyal opposition, it meant the opposition was constructive in its criticism and suggestions.
As for those who claimed 'GWB is not my president' and stayed the term loyal opposition is obviously lost them.
Now that's what I call loyal and true American pride.
On that question he pretended to decline expressing an opinion; but urged the action on the false suggestion that this Grand Lodge had voluntarily repudiated her jurisdiction over what he called the loyal portion of Virginia -- and in the form of queries, argued that that portion of her territory was now a Masonic waste, in which any Grand Lodge might charter a Lodge.