1. [ verb ] break down, literally or metaphorically
Synonyms: collapse cave_in give give_way founder break

"The wall collapsed" "The business collapsed" "The dam broke" "The roof collapsed" "The wall gave in" "The roof finally gave under the weight of the ice"

Related terms: change flop buckle slump break implode abandon collapse cave_in
2. [ verb ] (military) to take one's place in a military formation or line

"Troops fall in!"

3. [ verb ] become part of; become a member of a group or organization
Synonyms: join get_together

"He joined the Communist Party as a young man"

Related terms: unite rejoin sign_up unionize infiltrate affiliate band_oneself affiliate joiner
Similar spelling:   Fallin