WordWeb Online

1. Give sudden release to an expression
   "We burst out laughing"; "'I hate you,' she burst out"
    
2. Appear suddenly
   - pop out
    
3. Erupt or intensify suddenly
   "Unrest burst out in the country";
   - erupt, irrupt, flare up, flare, break open

Derived forms: burst out, bursting out, bursts out

Type of: appear, deepen, evince, express, intensify, show