Definition of SOLID

SOLID Adjective

Solid is an adjective describing something that possesses a firm, stable, and substantial structure or composition, exhibiting strength, durability, and resistance to deformation or change. It refers to objects, materials, or substances that are physically compact, cohesive, and resistant to pressure or external forces.

Firmness and Stability: Solid objects or materials are characterized by their firmness and stability, maintaining their shape and structure under normal conditions. They do not easily deform, collapse, or break apart, providing reliable support or foundation for various purposes, such as construction, engineering, or manufacturing.

Substantial and Durable: Solid substances are substantial and durable, capable of withstanding wear, impact, or environmental factors without significant deterioration or damage. They exhibit longevity and resilience, making them suitable for long-term use or applications where reliability and robustness are essential.

Physical Compactness: Solids possess physical compactness, with particles or molecules closely packed together in a fixed arrangement, resulting in a dense and coherent structure. This compactness contributes to their strength and stability, enabling them to maintain their integrity and resist deformation or disintegration.

Resistance to Deformation: Solid materials exhibit resistance to deformation, meaning they maintain their shape and volume when subjected to external forces or pressure. They do not easily compress, expand, bend, or flow like liquids or gases, retaining their form and structure even under significant stress or strain.

Examples of Solids: Examples of solids include metals (e.g., iron, copper, aluminum), minerals (e.g., quartz, diamond, salt), ceramics (e.g., porcelain, brick, concrete), wood, plastics, glass, and various composite materials used in construction, manufacturing, engineering, and everyday objects.

Solid is an adjective that describes objects, materials, or substances characterized by firmness, stability, and substantiality. Solids possess a compact and cohesive structure, exhibiting strength, durability, and resistance to deformation or change. They play essential roles in construction, manufacturing, engineering, and various applications where reliability, robustness, and longevity are required.

Examples of SOLID in a sentence

  • The table was made of a solid oak wood, ensuring durability and longevity.
  • After hours of research, she finally presented a solid argument in favor of renewable energy.
  • He maintained a solid workout routine to build muscle mass and improve his overall health.
  • The company’s financial position remained solid despite the economic downturn.
  • The bridge was constructed with solid steel beams to withstand heavy traffic and harsh weather conditions.
  • Her performance in the exam was solid, earning her a spot in the top percentile.
  • The team built a solid reputation for delivering high-quality products on time.
  • The foundation of the building was solid, providing stability and support for the structure.

Origin of SOLID

The term solid delves into the realm of substance, stability, and cohesion, embodying qualities of firmness, strength, and reliability. Rooted in material properties and metaphorical connotations, it has evolved into an adjective that describes objects, substances, or concepts characterized by their density, durability, and integrity.

  • Material Properties: Solid refers to a state of matter characterized by a definite shape and volume, in contrast to liquids or gases which take the shape of their container. Solids exhibit strong molecular cohesion, with particles arranged in a fixed pattern, giving them firmness and rigidity.
  • Physical Stability: Solidity implies physical stability and resistance to deformation or change under external forces. Solid objects maintain their shape and structure even when subjected to pressure, impact, or stress, making them suitable for various applications in construction, engineering, and manufacturing.
  • Reliability and Dependability: Solidity conveys a sense of reliability and dependability, suggesting that something is trustworthy, consistent, and steadfast. Solid relationships, organizations, or systems are characterized by their resilience, consistency, and ability to withstand challenges or adversity.
  • Substantiality and Strength: Solid objects or substances possess substantiality and strength, with a tangible presence and resistance to breakage or dissolution. This strength may manifest in physical materials such as metals, rocks, or concrete, as well as metaphorically in qualities such as character, resolve, or resolve.
  • Unity and Cohesion: Solidity implies unity and cohesion, suggesting a sense of wholeness, unity, or coherence. Solid communities, families, or teams are bound together by shared values, goals, or experiences, fostering a sense of belonging and mutual support.
  • Metaphorical Connotations: Beyond its literal meaning, solid has metaphorical connotations related to reliability, consistency, and trustworthiness. A solid argument, plan, or investment is well-founded and credible, while solid character or principles reflect integrity and moral strength.
  • Versatility and Adaptability: Solidity does not imply rigidity or inflexibility but can coexist with versatility and adaptability. Solid structures or systems may be designed to accommodate change or growth while maintaining their core integrity and functionality.

Solid encapsulates the essence of substance, stability, and reliability, reflecting qualities of firmness, strength, and cohesion in both physical and metaphorical contexts. From its roots in material properties to its broader implications for relationships, organizations, and character, the term embodies a sense of solidity and resilience in the face of challenges and uncertainty.


  • Firm
  • Stable
  • Strong
  • Robust
  • Substantial
  • Sturdy
  • Reliable
  • Dense


  • Liquid
  • Gas
  • Hollow
  • Weak
  • Flimsy
  • Fragile
  • Unstable
  • Fluid


  • Density
  • Mass
  • Cohesion
  • Rigidity
  • Durability
  • Consistency
  • Solidity
  • Strength

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