Of, relating to, produced by, or coming from the atmosphere.
"The atmospheric pressure dropped sharply before the storm arrived."
In plain English: Atmospheric means having a special mood, feeling, or atmosphere that makes something seem mysterious or exciting.
"The atmospheric conditions were perfect for a picnic in the park."
Usage: Use this adjective when describing weather conditions, air quality, or phenomena like pressure and humidity that originate in Earth's gaseous envelope. It is often applied metaphorically to settings with a specific mood or feeling, such as an atmospheric restaurant ambiance.
The word atmospheric comes from the Greek root atmos, meaning vapor or mist, combined with the suffix -ic to form an adjective describing something related to that vapor. It entered English in the 19th century to describe qualities pertaining to the atmosphere of a planet or world.