observe observe /əbˈzɝːv/

verb

1. () Discover or determine the existence, presence, or fact of  ( detect , discover , notice , find , observe )
   discover or determine the existence, presence, or fact of
    She detected high levels of lead in her drinking water
   She detected high levels of lead in her drinking water
    We found traces of lead in the paint
   We found traces of lead in the paint
   
2. () Make mention of  ( mention , observe , note , remark )
   make mention of
    She observed that his presentation took up too much time
   She observed that his presentation took up too much time
    They noted that it was a fine day to go sailing
   They noted that it was a fine day to go sailing
   
3. () Observe with care or pay close attention to  ( take note , observe , note )
   observe with care or pay close attention to
    Take note of this chemical reaction
   Take note of this chemical reaction
   
4. () Watch attentively  ( observe )
   watch attentively
    Please observe the reaction of these two chemicals
   Please observe the reaction of these two chemicals
   
5. () Show respect towards  ( abide by , honour [Canadian, British] , honor [American] , observe , respect )
   show respect towards
    Honor your parents!
   honor your parents!
   
6. () Behave as expected during of holidays or rites  ( keep , observe , celebrate )
   behave as expected during of holidays or rites
    Keep the commandments
   Keep the commandments
    Celebrate Christmas
   celebrate Christmas
    Observe Yom Kippur
   Observe Yom Kippur
   
7. () Follow with the eyes or the mind  ( watch over , observe , follow , keep an eye on , watch )
   follow with the eyes or the mind
    Keep an eye on the baby, please!
   Keep an eye on the baby, please!
    The world is watching Sarajevo
   The world is watching Sarajevo
    She followed the men with the binoculars
   She followed the men with the binoculars
   
8. () Stick to correctly or closely  ( maintain , observe , keep )
   stick to correctly or closely
    The pianist kept time with the metronome
   The pianist kept time with the metronome
    Keep count
   keep count
    I cannot keep track of all my employees
   I cannot keep track of all my employees
   
9. Conform one's action or practice to  ( observe , keep )
   conform one's action or practice to
    Keep appointments
   keep appointments
    She never keeps her promises
   she never keeps her promises
    We kept to the original conditions of the contract
   We kept to the original conditions of the contract