someone who writes for a magazine, newspaper or website and has no particular area of responsibility but can write about any subject that interests them, or suggest subjects for other people to write about

I met the European editor-at-large of American Vogue. 我见到了美国《时尚》杂志的欧洲特约编辑。

She is editor at large for Tatler. 她是《尚流》杂志的特约编辑。

He took up an editor-at-large role at Fortune magazine, writing an occasional column and contributing many story ideas. 他在《财富》杂志担任特约编辑一职，偶尔撰写专栏，并提供许多故事创意。