What does "one at a time" mean?

During sequentially discrete instances.

What is a synonym for "one at a time"?

Common synonyms include: one by one.

adv

adv ·Rare ·Advanced level

Adverb

1
During sequentially discrete instances. not-comparable
"He ate the peas on his plate one at a time."

Adverb

"He ate the peas on his plate one at a time."