Meaning: [əʊ] 
n. 1. a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust 2. the 15th letter of the Roman alphabet 3. the blood group whose red cells carry neither the A nor B antigens.
n. 1. a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust 2. the 15th letter of the Roman alphabet 3. the blood group whose red cells carry neither the A nor B antigens. 
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31. I regret getting involved with my daughter's marital problems; all its done is t o bring trouble about my ears.
32. I can't make out whether this letter is an e or an o.
33. The W.H.O. safety standard for ozone levels is somewhere about a hundred.
34. Don't worry — we'll have the money ready by 4 o 'clock, by hook or by crook.
35. I am Thine, O Lord, I have heard Thy voice.
36. She was really p.o.'d when she didn't get the job.
37. Guitar £200 o.n.o.
38. The vowels in English are a, e, i, o and u.
39. Ostertagia ostertagi O. ostertagi has a direct life cycle.
40. She and o Pappous came to a decision.
41. O Tess, forgiveness does not apply to the case!
42. Manuscripts and queries to the editors at P.O.sentencedict.com
43. O Lord, hear our prayer.
44. I was more preoccupied by my O levels.
45. That was O.K. Perhaps it was a good omen.
46. Unthinking o Id friends will still send cheery cards.
47. Link him with O. J.
48. On, O joyful, be fleet.
49. We beseech thee, O Lord.
50. O false and shameless woman, I am your husband.
51. No, it was because O Brother is a musical.
52. H 2 O 2, Hydrogen peroxide.
53. Once a B.O.A.T., difficulties with vehicular use can be regulated by a traffic regulation order.
54. Just seven days later, Benjamin O.. Davis was named the first black general in the regular army.
55. Measure O calls for extending a two-lane road through the shopping center parking lot.
56. Well, O. K. But throw him out of office in a rank-and-file election?
57. Finally I got out into population and that was O. K. Nurses, all kinds of dope.
58. The flooding followed a 10-15 o list to port, due to water pouring into the forward ballast tanks.
59. Thus differences in 18 O/ 16 O ratio may be expected between water and calcite precipitating from it.
60. They produce the octave above the natural note of the string and are indicated by the sign O placed above the note.