sphere
A sphere is a perfectly round three-dimensional object where every point on its surface is equidistant from its center. Metaphorically, it refers to a specific field of activity, interest, or social environment where someone has power or expertise.
Examples
3 of 5The children were fascinated by the large wooden sphere sitting in the center of the museum.
The kids were amazed by the big round wooden ball located in the middle of the museum.
He has spent his entire career operating within the highest levels of the political sphere.
He has worked his whole life inside the most important parts of the political world.
That topic is way out of my sphere, so I can't really comment on it.
That subject is outside of my area of knowledge, so I cannot give an opinion.
Word Family
Memory Tip
Think of the word 'Atmosphere' — it is the 'sphere' of air that surrounds our 'globe'. Both involve a round area of influence.
Quick Quiz
The diplomat worked hard to maintain his country's ___ of influence in the region.
Correct!
The correct answer is: sphere
Examples
The children were fascinated by the large wooden sphere sitting in the center of the museum.
everydayThe kids were amazed by the big round wooden ball located in the middle of the museum.
He has spent his entire career operating within the highest levels of the political sphere.
formalHe has worked his whole life inside the most important parts of the political world.
That topic is way out of my sphere, so I can't really comment on it.
informalThat subject is outside of my area of knowledge, so I cannot give an opinion.
The celestial sphere was a fundamental concept in ancient Greek astronomy for mapping stars.
academicThe imaginary globe of the sky was a basic idea used by ancient Greeks to map the stars.
The merger will allow the company to expand its sphere of influence in the European market.
businessThe business deal will help the company increase its power and reach in the European market.
Word Family
Common Collocations
Common Phrases
within one's sphere
Inside someone's area of knowledge or control.
outside my sphere
Not part of my expertise or responsibility.
domestic sphere
The area of life relating to the home and family.
Often Confused With
A circle is a two-dimensional flat shape, whereas a sphere is a three-dimensional solid object.
Atmosphere refers specifically to the gases surrounding a planet, while sphere is a general term for any round object or area of activity.
Usage Notes
When used metaphorically, 'sphere' implies a boundary of influence or expertise. It is commonly paired with 'of' to define the area, such as 'sphere of interest' or 'sphere of operation'.
Common Mistakes
Learners often use 'circle' when they should use 'sphere' for 3D objects or abstract domains of influence. Additionally, avoid using it as a verb; use 'ensphere' or 'encompass' instead.
Memory Tip
Think of the word 'Atmosphere' — it is the 'sphere' of air that surrounds our 'globe'. Both involve a round area of influence.
Word Origin
Derived from the Middle English 'spere', which comes from the Old French 'esphere' and the Latin 'sphaera', originally from the Greek 'sphaira' meaning 'ball'.
Grammar Patterns
Cultural Context
The term 'public sphere' is a significant concept in Western philosophy and sociology, representing a space where citizens can discuss politics independently of the state.
Quick Quiz
The diplomat worked hard to maintain his country's ___ of influence in the region.
Correct!
The correct answer is: sphere
Related Grammar Rules
Related Vocabulary
Related Words
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