column; feature article
Refers to a regular or stand-alone opinion piece, essay, or feature in a newspaper, magazine, or website, often with a distinct author or theme.
He writes a column in the newspaper every week.
He writes a column for the newspaper every week.
The columns in this magazine are always interesting.
Her column was published in the magazine.
I always read his column.
欄 refers to the section or slot in a layout (e.g. 投書欄), while コラム refers to the actual written piece placed in that section.
コラム is the written column itself, while コラムニスト is the person who writes it.
book; volume; script · this; present; current; in question · main; head; principal · real; genuine; regular; proper · counter for long cylindrical objects; counter for films, TV shows, etc.; counter for goals, home runs, etc.; counter for telephone calls
Borrowed from English 'column', referring to a regular newspaper or magazine feature.