Definition

1. Adjective:
   • Characterized by opposite extremes; completely opposed: "diametric" describes things that are at opposite ends of a spectrum or are in direct and total opposition to each other.
   • Related to or along a diameter: In a geometric or spatial sense, "diametric" pertains to a diameter, which is a straight line passing from side to side through the center of a circle or sphere.

Examples of Usage

• Adjective (Opposition):
  • Their opinions on the matter were diametric; one was for it, the other completely against.
  • The two political parties hold diametric views on taxation.
• Adjective (Geometric):
  • The diametric measurement of the circle was 10 centimeters.
  • The engineer calculated the diametric plane of the sphere.

Advanced Usage

• "diametrically opposed": This is a very common adverbial phrase meaning "completely and utterly opposite."
  • Their philosophies are diametrically opposed.
  • The results were diametrically opposed to our predictions.

Variants and Related Words

• Diametrical (adj): This is a direct synonym and can be used interchangeably with "diametric" in both its meanings.
  • They took diametrical positions on the debate.
• Diameter (n): A straight line passing from side to side through the center of a circle or sphere.
  • The diameter of the pipe is two inches.

Synonyms

• Opposite: Directly contrary.
• Antithetical: Directly opposed or contrasted.
• Contradictory: Mutually opposed or inconsistent.
• Polar: Directly opposite in character or tendency.

Antonyms

• Identical: Exactly the same.
• Similar: Resembling without being identical.
• Compatible: Able to exist or work together without conflict.

Related Phrases

• At opposite ends of the spectrum: A common idiom expressing a diametric difference in views or positions.
  • On environmental policy, the two candidates are at opposite ends of the spectrum.

Adjective

1. characterized by opposite extremes; completely opposed
   • in diametric contradiction to his claims
   • diametrical (or opposite) points of view
   • opposite meanings
   • extreme and indefensible polar positions
2. related to or along a diameter
   • the diametral plane