Comment by dan-robertson

Nation is a word with two meanings. One is ‘country’ so the answer is yes (note that nation-state is a silly phrase under this meaning). You see it in terms like nationalisation of industry or national anthem. The other meaning is a group of people with (typically) shared ethnicity, cultural heritage, language, and often, country. For this a multiethnic country doesn’t usually fit the bill. But to some extent words can mean whatever you want them to and lots of groups want themselves to be considered nations (either to promote some unity across diverse people or to push out undesirable groups) even if they don’t strictly fit the usual definition.