Synonym: befoulment, contamination, defilement. Similar words: evolution, resolution, revolutionary, execution, collection, institution, distribution, prosecution. Meaning: [pə'luːʃn] 
n. 1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities 2. the state of being polluted 3. the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors.
n. 1. undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities 2. the state of being polluted 3. the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors. 
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31. Because of the pollution, the trees are almost completely stripped of bark.
32. The government is being widely criticized in the press for failing to limit air pollution.
33. The men were clearing all the pollution off the shore.
34. Growing levels of pollution represent a serious health hazard to the local population.
35. It was feared that the break-up of the oil tanker would result in further pollution.
36. Governments of many countries have established laws to protect the air,[http://sentencedict.com/pollution.html] forests and sea resources and to stop environmental pollution.
37. Pollution was carried inland by the wind.
38. The stones are being eaten away by pollution.
39. Pollution led to a shrinkage of grasslands.
40. They devised proposals to deal with air pollution.
41. Steps are to be taken to abate pollution.
42. We need a good working definition of "pollution".
43. City dwellers suffer higher pollution levels.
44. Air pollution is a serious health hazard .
45. Pollution along the coastline is threatening marine life.
46. Coal fell into disfavour because burning it caused pollution.
47. Air pollution has risen above an acceptable level.
48. Pollution is still very much a live issue.
49. Environmental groups want tougher action on pollution from cars.
50. The fuel now is superordinated for the city's pollution.
51. The new law will reduce pollution of the rivers.
52. The monitoring system allows recognition of pollution hot spots.
53. The level of pollution in the river was falling.
54. Levels of pollution present in the atmosphere are increasing.
55. Pollution is rapidly killing off plant life.
56. There's no quick fix for stopping pollution.
57. We need to take drastic steps to reduce pollution.
58. It's perfectly feasible to produce electricity without creating pollution.
59. The countryside has been ravaged by pollution.
60. We are taking steps to prevent pollution.
More similar words: evolution, resolution, revolutionary, execution, collection, institution, distribution, prosecution, contribution, constitution, institutional, collaboration, constitutional, roll up, poll, notion, option, action, nation, motion, edition, fiction, section, question, portion, mention, auction, location, position, zonation.