fall together

(intransitive) To be merged or coalesce; to become identical.
(intransitive) To come together.
(Newfoundland, archaic, intransitive) Of the eyes: to close, especially from tiredness.
(intransitive, obsolete) to contract

The idiomatic sense “to merge” may be a loan translation of to coincide. Compare also German zusammenfallen (“to merge”).

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