WordWeb Online

1. In constant agitation
   "a seething flag-waving crowd filled the streets"; "a seething mass of maggots"; "lovers and madmen have such seething brains"

1. Be noisy with activity
   "This office is seething with activity"
   - hum, buzz
    
2. Be in an agitated emotional state
   "The customer was seething with anger"
   - boil
    
3. Foam as if boiling
   "a seething liquid"
    
4. Boil vigorously
   "The liquid was seething"
   - roll

See also: agitated

Type of: be, boil, churn, effervesce, fizz, foam, form bubbles, froth, moil [N. Amer], roil, sparkle

Encyclopedia: Seething