two rows; double file
Refers to two lines or rows of people or things, often used in contexts like seating, marching, or arrangement.
生徒たちは二列に並んで歩いた。
The students walked in two rows.
椅子を二列に並べてください。
Please arrange the chairs in two rows.
Compound of 二 (two) and 列 (row, line).