WordWeb Online

1. Expecting unquestioning obedience
   "insufferably overbearing behaviour toward the waiter";
   - authoritarian, dictatorial
    
2. Having or showing arrogant superiority to and disdain of those one views as unworthy
   "some economists are overbearing of their colleagues in other social disciplines";
   - disdainful, haughty, imperious, lordly, prideful, sniffy [informal], supercilious, swaggering, toplofty [US, informal], orgulous [archaic]

1. Overcome
   "overbear criticism, protest, or arguments"
    
2. Bear too much
    
3. Contract the abdominal muscles during childbirth to ease delivery
   - bear down

See also: domineering, proud

Type of: bear, compact, compress, constrict, contract, dominate, press, squeeze, turn out