What does "in twos" mean?

Grouped by pairs; arranged in groups of two.

What is a synonym for "in twos"?

Common synonyms include: count by twos.

prep_phrase

prep_phrase ·Rare ·Advanced level

Prep_phrase

1
Grouped by pairs; arranged in groups of two.
"Animals entered Noah's ark in twos."

"Animals entered Noah's ark in twos."