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1. State categorically
   - asseverate, maintain
    
2. To declare or affirm solemnly and formally as true
   "Before God I assert I am innocent";
   - affirm, verify, avow, aver, swear
    
3. Insist on having one's opinions and rights recognized
   "Women should assert themselves more!";
   - put forward
    
4. Postulate positively and assertively
   "The letter asserts a free society";
   - insist

Derived forms: asserting, asserted, asserts

Type of: acquit, bear, behave, carry, comport, conduct, declare, deport, insist, posit, postulate, pronounce, take a firm stand

Encyclopedia: Assert