I opened your source-answers see above- and these were the first 2 sentences. Cherry picking is ignoring the obvious and going for the obscure.
The definition from your source is exactly what I wrote. What do you want?
“A national policy of abstaining from political or economic relations with other countries. as a historic attitude in the United States can best be defined as opposition to intervention in war outside the western hemisphere, particularly in Europe; to involvement in permanent military alliances; and to participation in organizations of collective security. Above all, isolationists seek to preserve the United States’s freedom of action.”