Definition

Adjective 1. Logically valid; based on sound reasoning or evidence: Refers to an argument, theory, or belief that is solidly supported by facts, logic, or good principles. 2. Thoroughly instructed in the basic principles of a subject: Refers to a person who has received a firm and comprehensive foundation in a field of knowledge.

Usage and Examples

• Describing an argument or idea:

  • The scientist presented a well-grounded theory that was supported by decades of experimental data.
  • Her criticism of the policy was well-grounded in economic principles.

• Describing a person's knowledge:

  • As a well-grounded engineer, she could tackle problems from both theoretical and practical perspectives.
  • The program aims to produce well-grounded scholars in classical literature.

Advanced Usage

• "well-grounded in": This is the most common construction, used to specify the area of knowledge or the basis for a belief.
  • A good judge must be well-grounded in the law and in ethics.
  • Their fears about the system's security are well-grounded in recent events.

Variants and Related Words

• Well-founded (adjective): Often used interchangeably with "well-grounded" to mean based on good reasons or evidence.
  • He had well-founded suspicions about the deal.
• Grounding (noun): The foundation of knowledge or instruction in a subject.
  • She received an excellent grounding in mathematics.

Synonyms

• Sound: (e.g., )
• Valid: (e.g., )
• Justified: (e.g., )
• Well-founded: (e.g., )

Antonyms

• Unfounded: (e.g., )
• Baseless: (e.g., )
• Illogical: (e.g., )
• Unsubstantiated: (e.g., )

Adjective

1. logically valid
   • a sound argument