row (n.1)

"line of people or things," Old English ræw "a row, line; succession, hedge-row," probably from Proto-Germanic *rai(h)waz (source also of Middle Dutch rie, Dutch rij "row;" Old High German rihan "to thread," riga "line;" German Reihe "row, line, series;" Old Norse rega "string"), possibly from PIE root *rei- "to scratch, tear, cut" (source also of Sanskrit rikhati "scratches," rekha "line"). Meaning "a number of houses in a line" is attested from mid-15c., originally chiefly Scottish and northern English. Phrase a hard row to hoe attested from 1823, American English.

row (v.)

"propel with oars," Old English rowan "go by water, row" (class VII strong verb; past tense reow, past participle rowen), from Proto-Germanic *ro- (source also of Old Norse roa, Dutch roeien, West Frisian roeije, Middle High German rüejen), from PIE root *ere- "to row."

row (n.2)

"noisy commotion," 1746, Cambridge University slang, of uncertain origin, perhaps related to rousel "drinking bout" (c. 1600), a shortened form of carousal. Klein suggests a back-formation from rouse (n.), mistaken as a plural (compare pea from pease).

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Definitions of row from WordNet
row (n.)
an arrangement of objects or people side by side in a line;
a row of chairs
row (n.)
an angry dispute;
Synonyms: quarrel / wrangle / words / run-in / dustup
row (n.)
a long continuous strip (usually running horizontally);
rows of barbed wire protected the trenches
a mackerel sky filled with rows of clouds
row (n.)
(construction) a layer of masonry;
Synonyms: course
row (n.)
a linear array of numbers, letters, or symbols side by side;
row (n.)
a continuous chronological succession without an interruption;
they won the championship three years in a row
row (n.)
the act of rowing as a sport;
Synonyms: rowing
row (v.)
propel with oars;
row the boat across the lake