To break into pieces or to lose control emotionally or physically.
Example: After the accident, the old car started to fall apart.
To use something as a backup or last resort.
Example: When his plan failed, he had to fall back on his savings.
To fail to keep up with a schedule or progress.
Example: She fell behind in her studies during the busy semester.
To be tricked or deceived; or to develop romantic feelings for someone.
Example: He fell for the scam email. / She fell for him the moment they met.
To collapse inward; or to line up in formation (often military).
Example: The old wall finally fell in. / Soldiers were ordered to fall in.
To decrease or diminish; or to physically drop from a surface.
Example: Sales fell off after the holiday season. / The book fell off the shelf.
To have a disagreement or quarrel; or to drop or come out (like hair or teeth).
Example: They fell out over money. / My tooth is starting to fall out.
To fail to happen or be completed (usually plans or deals).
Example: Our vacation plans fell through because of the storm.
To trip and collapse to the ground.
Example: Be careful not to fall over that step.
To collapse or drop to the ground.
Example: The statue fell down during the earthquake.