sphere

Pronunciation: /sfɪər/

noun

Difficulty: common

Definition of sphere

sphere (noun): A distinct realm of activity, interest, or expertise, often delineated by boundaries of influence or knowledge.

Example: In the sphere of astrophysics, her groundbreaking research has earned international acclaim.

Best for: common-difficulty vocabulary; learners who already know "domain" or "realm"; GRE Verbal (Text Completion, Sentence Equivalence); SAT Reading & Writing (Words in Context).

Origin of sphere

Language of origin: Greek

Root word: sphaira

Original meaning: ball, globe

How it evolved: Initially used to describe physical globes, its meaning expanded metaphorically to describe realms or domains of influence or activity.

The word 'sphere' originated in Middle English, derived from Latin 'sphaera', which itself was borrowed from Greek 'sphaira', meaning 'ball' or 'globe'.

First known use: 14th century

How to Remember sphere

Imagine a globe (a physical sphere) representing various regions of expertise—each one is its own 'sphere' of activity.

Synonyms for sphere

Antonyms of sphere

  • ignorance
  • void
  • chaos
  • disorder

sphere in a Sentence

  1. In the sphere of astrophysics, her groundbreaking research has earned international acclaim.
  2. The diplomat proved adept at navigating the complex sphere of international relations.
  3. The artist carved out a unique sphere of influence in the contemporary art world.

sphere in Literature & Culture

The word 'sphere' appears in Shakespeare's works and is often used in political and scientific literature to describe realms of control, influence, or thought.

Usage Notes

Commonly used to describe professional or intellectual domains, but it can also refer to literal physical spheres or globes. Avoid confusing it with unrelated uses like 'atmosphere'.

Why sphere Matters for GRE & SAT

Essential for GRE test-takers as it encapsulates abstract and metaphorical uses, which frequently appear in reading comprehension and sentence equivalence questions.

Word Family

spherical (adjective)
Shaped like a sphere; round.
spherically (adverb)
In the shape of or relating to a sphere.
spherism (noun)
A philosophical doctrine concerning the spherical nature of celestial bodies.

Did You Know?

  • The term 'sphere' is often used in geometry to describe a perfectly symmetrical three-dimensional object.
  • In ancient Greek cosmology, celestial spheres were thought to carry planets and stars in their orbits.
  • The phrase 'sphere of influence' is widely used in geopolitics to describe countries or regions under the sway of a dominant power.
  • domain
  • scope
  • Sycophant — A person who acts obsequiously toward someone important to gain advantage.
  • sadistic — taking pleasure in causing pain or suffering to others
  • sagacious — demonstrating wisdom or sound judgment
  • salubrious — promoting health or well-being
  • salutary — beneficial, especially in promoting health or well-being
  • sanctimonious — giving the impression that one is morally superior

More Vocabulary Words Starting with S

  • Sycophant — A person who acts obsequiously toward someone important to gain advantage.
  • sadistic — taking pleasure in causing pain or suffering to others
  • sadistic — taking pleasure in causing pain or suffering to others
  • sagacious — demonstrating wisdom or sound judgment
  • sagacious — demonstrating wisdom or sound judgment
  • salubrious — promoting health or well-being
  • salubrious — promoting health or well-being
  • salutary — beneficial, especially in promoting health or well-being
  • salutary — beneficial, especially in promoting health or well-being
  • sanctimonious — giving the impression that one is morally superior