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1. Discovered or determined by scientific observation
   "no explanation for the observed phenomena"
   - ascertained, discovered

1. Determine the existence, presence, or fact of
   - detect, find, discover, notice
    
2. Speak of something; say to bring other people's attention to something
   "She observed that his presentation took up too much time"
   - note, mention, remark
    
3. Pay close attention
   - note, take note
    
4. Watch attentively
   "Please observe the reaction of these two chemicals"
    
5. Show respect towards
   "observe your parents!"
   - respect, honor [US], honour [Brit, Cdn], abide by, fete [], fête []
    
6. Behave as expected during holidays or rites
   "Observe Yom Kippur"
   - celebrate, keep
    
7. Follow with the eyes or the mind
   "The world is observing Sarajevo"
   - watch, follow, watch over, keep an eye on
    
8. Stick to correctly or closely
   "The pianist observed time with the metronome"
   - keep, maintain
    
9. Conform one's action or practice to
   "observe appointments"
   - keep

See also: determined, observable, observance, observant, observation, observer

Type of: accept, check, check into, check out, check over, check up on, go over, look into, say, sight, spy, state, sus [Brit], suss [Brit], suss out [Brit], tell, watch

Encyclopedia: Observe