1A line or queue formed by people or things waiting in order; also a procession, such as in a ceremony or parade.
ラーメン屋の前に長い行列ができていた。
A long line had formed in front of the ramen shop.
初売りのセールで開店前から行列に並んだ。
I stood in line before opening for the New Year's first sale.
結婚式の行列が教会から出てきた。
The wedding procession came out of the church.
行列に割り込むのはマナー違反だ。
Cutting in line is a breach of manners.
2In mathematics, a rectangular array of numbers or symbols arranged in rows and columns; a matrix.
二つの行列を掛け合わせる計算を習った。
We learned how to calculate the multiplication of two matrices.
この行列は正方行列で、行数と列数が等しい。
This matrix is a square matrix, with equal numbers of rows and columns.