In a row means arranged in one straight line. Stand in a row, chairs in a row, three in a row.
It also means consecutively in time, so somebody can win four years in a row. Both senses are everyday and the sentence makes clear which is meant.
1phrasein a rowArranged in one straight line.
“The boots were lined up in a row by the door.”
in a row is a phrase.
Practised in Directions & Position