fall in

1. 1.

   break down, literally or metaphorically

   “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”

   Synonymscollapsecave ingivegive waybreakfounder

   Broaderchange

   Narrowerimplodebuckleflopbreakslump
2. 2.

   to take one's place in a military formation or line

   “Troops fall in!”
3. 3.

   become part of; become a member of a group or organization

   “He joined the Communist Party as a young man”

   Synonymsjoinget together

   Narrowersign upband oneselfunionizeaffiliaterejoininfiltrateunite

Questions about fall in

What does fall in mean?

fall in means "break down, literally or metaphorically". That is the primary sense; the word has 3 in total, listed in full on this page.

What is another word for fall in?

Close synonyms include collapse, cave in, give, give way, break. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is fall in a common word?

fall in is banded "Familiar" — widely understood, used when the subject calls for it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.