Magma

//ˈmæɡ.mə// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    The molten matter within the earth, the source of the material of lava flows, dikes of eruptive rocks, etc. countable, uncountable

    "By the pathside, there are occasional large boulders that shown black crystals the size of a fingernail; these are pyroxene minerals that had time to crystallise out deep within the chamber of liquid rock – or magma – beneath the volcano."

  2. 2
    molten rock in the earth's crust wordnet
  3. 3
    A basic algebraic structure consisting of a set equipped with a single binary operation. countable, uncountable
  4. 4
    Any soft doughy mass. countable, uncountable
  5. 5
    The residuum after expressing the juice from fruits. countable, uncountable

Synonyms

All synonyms
admixturealloyamalgambasaltbedrockblend

Example

More examples

"Magma can rise when pieces of Earth's crust called tectonic plates slowly move away from each other. The magma rises up to fill in the space."

Etymology

Etymology tree Proto-Indo-European *mh₂ǵyéti Ancient Greek μάσσω (mássō) Proto-Indo-European *-mn̥ Ancient Greek -μα (-ma) Ancient Greek μάγμα (mágma)der. English magma From Ancient Greek μάγμα (mágma, “paste”).

Related phrases

magma chamberfree group

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.