Pollution



[puh-loo-shuh n] /pəˈlu ʃən/

noun
1.
the act of or the state of being .
2.
the introduction of harmful substances or products into the environment:
air pollution.
/pəˈluːʃən/
noun
1.
the act of polluting or the state of being polluted
2.
harmful or poisonous substances introduced into an environment
n.

mid-14c., “discharge of semen other than during sex,” later, “desecration, defilement” (late 14c.), from Late Latin pollutionem (nominative pollutio) “defilement,” noun of action from past participle stem of Latin polluere “to soil, defile, contaminate,” from por- “before” + -luere “smear,” from PIE root *leu- “dirt; make dirty” (cf. Latin lutum “mud, mire, clay,” lues “filth;” Greek lyma “filth, dirt, disgrace,” lymax “rubbish, refuse;” Old Irish loth “mud, dirt;” Lithuanian lutynas “pool, puddle”). Sense of “contamination of the environment” first recorded c.1860, but not common until c.1955.

pollution pol·lu·tion (pə-lōō’shən)
n.

pollution
(pə-l’shən)
The contamination of air, water, or soil by substances that are harmful to living organisms. Pollution can occur naturally, for example through volcanic eruptions, or as the result of human activities, such as the spilling of oil or disposal of industrial waste. ◇ Light from cities and towns at night that interferes with astronomical observations is known as light pollution. It can also disturb natural rhythms of growth in plants and other organisms. ◇ Continuous noise that is loud enough to be annoying or physically harmful is known as noise pollution. ◇ Heat from hot water that is discharged from a factory into a river or lake, where it can kill or endanger aquatic life, is known as thermal pollution.

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