Earthquake/ˈɜːθkweɪk/nounA shaking of the ground, caused by volcanic activity or movement around geologic faults.(planetary geology) Such a quake specifically occurring on the planet Earth, as opposed to other celestial bodies.Synonyms: earthdin, quake, seism, temblor, terremote, tremblor, tremor🔗 Explore synonyms & relationships🌍 See word origin & history