(intransitive) To disintegrate, to break into pieces. / (idiomatic) To be emotionally in crisis.

(idiomatic) to be less satisfactory than expected; to be inadequate or insufficient

Third-person singular simple present indicative form of fall about

To laugh so much that one's entire body moves somewhat uncontrollably.

present participle of fall about

(archaic) Epilepsy.

Massive waterfalls located on the Niagara River. / A city in New York near the Falls. / A city in Ontario near the Falls.

(intransitive, idiomatic) To fall from an upright or standing position to a horizontal or prone position. / (intransitive, idiomatic) Of an argument, to fail to be valid.

(intransitive, formal or literary) To become pregnant.

To become ill, to get sick, to sicken.