one by one

Idioms  

1. Also, one at a time. Individually in succession, as in The ducklings jumped into the pond one by one, or One at a time they went into the office. Formerly also put as one and one and one after one, this idiom dates from about a.d. 1000.

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Example Sentences

Soon the gym is brimming with tension as the contestants are brought forth one by one, having words of various levels of difficulty flung at them.

From The Wall Street Journal

When that happens, the precise order needed for quantum operations breaks down, since the extra photons interfere with the intended one by one flow.

From Science Daily

He has since kicked out each of the boys one by one — first her elder son, then his own son and most recently the youngest, who is only 13.

From MarketWatch

"It will take time to reply to them all but I'll start doing them one by one after this."

From Barron's

“While most people were trying to dodge the downpour—TV screens giving up one by one, umbrellas suddenly becoming the hottest commodity in the room—we at InPlanet were secretly thrilled,” he said.

From The Wall Street Journal