in name only

US /ɪn neɪm ˈoʊnli/
UK /ɪn neɪm ˈoʊnli/
"in name only" picture
1.

名义上的, 徒有虚名

existing in title or theory but not in reality

:
He is the manager in name only; his assistant does all the real work.
他只是个名义上的经理;他所有的实际工作都是他的助理做的。
Their marriage was in name only; they lived separate lives.
他们的婚姻只是名义上的;他们过着各自的生活。