Synonym: behold, celebrate, commemorate, comply with, contemplate, examine, follow, heed, inspect, keep, note, obey, perceive, practice, review, scrutinize, see, study. Antonym: violate. Similar words: observer, observation, serve, serve as, reserve, preserve, nerve, serving. Meaning: [əb'zɜrv /-zɜːv] 
v. 1. discover or determine the existence, presence, or fact of 2. make mention of 3. observe with care or pay close attention to 4. watch attentively 5. show respect towards 6. celebrate, as of holidays or rites 7. follow with the eyes or the mind 8. observe correctly or closely 9. conform one's action or practice to.
v. 1. discover or determine the existence, presence, or fact of 2. make mention of 3. observe with care or pay close attention to 4. watch attentively 5. show respect towards 6. celebrate, as of holidays or rites 7. follow with the eyes or the mind 8. observe correctly or closely 9. conform one's action or practice to. 
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1 We must observe the correct protocol.
2 I want you to observe all the details.
3 You'll be quite safe if you observe certain basic precautions.
4 It is not possible to observe this phenomenon directly,[www.Sentencedict.com] but its effects can be seen in the rise in global temperatures.
5 The last thing to be neglected is to observe the filial piety.
6 The role of scientists is to observe and describe the world, not to try to control it.
7 Didn't you observe the difference?
8 Will the rebels observe the ceasefire?
9 Failure to observe club rules may result in expulsion.
10 Did he observe on your unusual performance?
11 They were careful to observe the proprieties.
12 Observe how the people in the group interact.
13 We must observe the decencies and attend the funeral.
14 We'll have to observe the formalities.
15 The submarine bottomed to observe the ocean floor.
16 Do they observe Christmas Day in that country?
17 You must follow/obey/observe the rules.
18 Someone who doesn't observe traffic regulations will sweat.
19 Be careful to observe the proprieties.
20 The governor failed to observe the rules of natural justice.
21 We observe a striking shift away from a labor theory among all mainline economists.
22 Observe what is best and to strive to universalize these qualities.
23 The satellite will observe objects that are particularly interesting astronomically.
24 The Royal Greenwich Observatory was founded to observe and catalogue the stars.
25 People must observe the law. Nobody should be an exception.
26 The UN has called on both sides to observe the ceasefire.
27 Let's observe a minute's silence in memory of the dead.
28 To be acquainted with the merit of ministry(sentencedict.com), we need only observe the condition of the people. 
29 In the various regions of India, Hindus worship different gods and observe different religious festivals.
30 In 1948, he went to lake Kivu in the Congo to observe a new volcano which he later named Kituro.
More similar words: observer, observation, serve, serve as, reserve, preserve, nerve, serving, service, intervention, reservation, conservation, conservative, social services, subsequent, obstacle, obstreperous, carve, curve, survey, harvest, user, laser, insert, closer, series, desert, assert, nervous, surveillance.