verb, -lapsed, -laps⋅ing, noun | 1. | to fall or cave in; crumble suddenly: The roof collapsed and buried the crowd. |
| 2. | to be made so that sections or parts can be folded up, as for convenient storage: This bridge table collapses. |
| 3. | to break down; come to nothing; fail: Despite all their efforts the peace talks collapsed. |
| 4. | to fall unconscious or as if unconscious or physically depleted, as from a stroke, heart attack, disease, or exhaustion. |
| 5. | Pathology.
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| 6. | to cause to collapse: He collapsed the table easily. |
| 7. | a falling in or together: Three miners were trapped by the collapse of the tunnel roof. |
| 8. | a sudden, complete failure; breakdown: The bribery scandal brought about the complete collapse of his industrial empire. |

collapse col·lapse (kə-lāps')
v. col·lapsed, col·laps·ing, col·laps·es
To break down suddenly in strength or health and thereby fall into a condition of extreme prostration.
To fall together or inward suddenly.
A condition of extreme prostration.
A falling together of the walls of a structure.
The failure of a physical system.