1.
line; row (of text)
A horizontal or vertical line of text in writing, printing, or on a screen. Used when referring to specific positions in documents, code, or printed material.
2.
row (in the kana chart)
A row of the Japanese syllabary chart (五十音図), grouping kana that share the same consonant.
Read as ぎょう, this word refers to a line of text or a row in a chart. Do not confuse with other readings of the same kanji: 行く (to go), 行う (to carry out), or 行 (used in compounds like 銀行).
As a counter, 行 counts lines of text: 一行 (one line), 二行 (two lines), 三行 (three lines). The suffix 行目 specifies the ordinal position: 一行目 (first line).
Common collocations
Kana chart usage
In the 五十音図, each consonant group is called a 行: あ行, か行, さ行, etc. Each column is called a 段 (だん): あ段, い段, etc.