surroundings
n.-
1 environment (n.) B2 Upper Intermediatethe place where you are and the things that are around you.
the physical area and conditions surrounding a person or thing; the environment or setting.
ExampleThe hotel was simple, but the natural surroundings were beautiful.
ExampleAfter living in a crowded city for years, she found it difficult to adjust to the quiet surroundings of the countryside.
UsageAlways used in the plural form when referring to an environment.
PitfallThe surrounding was very beautiful.The surroundings were very beautiful.In this sense, the word is always plural and takes a plural verb.
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2 thermodynamics (n.) C1 Advanced Technical Scienceeverything in the universe that is not part of the specific system being studied.
the portion of the universe outside the boundaries of a thermodynamic system.
ExampleHeat is transferred from the chemical reaction to its surroundings.
ExampleIn an isolated system, there is no exchange of either matter or energy with the surroundings.
UsageUsed to distinguish the external environment from the internal system in physics and chemistry.