Yes, and any number of men in the columns.
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Jackson66121: beside one another with bodies in line I think the definition you quote would be best understood by someone who already understands the concept.
There don't have to be columns for the men to be standing abreast.
Of course, the dictionary entry doesn't say that there do - the bracketed phrase is just an example.
On the playground,
AvangiOn the playground, children are told, "Line up single file." They've learned what that means.
Sometimes they're told, "Line up in a column," which is usually the same as "single file."
Would it be correct to say "Line up single column"? Perhaps, it's not idiomatic.Avangi
AvangiI've never heard "single column" as a compound adjective (like "single file")."Line up single file" - Is "single file" a compond adjective? It modifies "Line up" which is, I think, a verbial phrase? Doesn't it make "single file" an adverbial phrase?
AvangiHowever, in multiple columns, the "in" is not used: "