Definition

1. Adjective:

   • Firm and stable in shape; not liquid or gaseous: A state of matter with definite shape and volume that resists forces like compression.
   • Strong and well-made; not flimsy: Having a structure that is substantial, durable, and reliable.
   • Of good substantial quality; dependable: Based on reliable facts, sound reasoning, or genuine merit.
   • Uniform and unbroken; continuous: Having the same substance, color, or character throughout, without gaps or interruptions.
   • Financially sound and secure: In a good financial condition, likely to withstand difficulties.
   • Serious and worthy of respect: Of substantial character, not superficial or frivolous.
   • Unanimous or undiversified: Acting together as a single, unified whole.

2. Noun:

   • A substance or object that is solid, not liquid or gas: Matter in a state that retains a definite shape and volume.
   • A three-dimensional geometric shape or object: A figure having length, width, and depth.

Usage and Examples

• Adjective:

  • Ice is water in the solid state. (Describing a physical state of matter)
  • They built the house on solid ground. (Describing a firm, stable foundation)
  • The report was based on solid evidence. (Describing reliable, substantial information)
  • The curtain was a solid blue. (Describing a uniform, unbroken color)
  • The company remains solid despite the economic crisis. (Describing financial soundness)
  • He is known for his solid character. (Describing a serious, respectable nature)
  • The union voted as a solid bloc. (Describing a unified, undiversified group)

• Noun:

  • At room temperature, iron is a solid. (Referring to a substance in its solid state)
  • A cube is a solid with six equal square faces. (Referring to a three-dimensional shape)

Advanced Usage

• "Solid as a rock": Extremely firm, reliable, or dependable.
  • Their friendship is solid as a rock.
• "In solid with (someone)": To be in a position of favor or good standing with someone.
  • He is in solid with the management after his successful project.

Variants and Related Words

• Solidify (verb): To make or become solid, hard, or firm.
  • The mixture will solidify as it cools.
• Solidity (noun): The quality or state of being solid; firmness, strength, or substantial nature.
  • The solidity of the old bridge was tested.
• Solidly (adverb): In a firm, substantial, or uniform manner.
  • The team performed solidly throughout the season.

Synonyms

• Firm: Having a solid, almost unyielding surface or structure.
• Sturdy: Strongly and solidly built.
• Substantial: Of considerable importance, size, or worth.
• Sound: Based on valid reasoning or good condition; secure.
• Unanimous: Fully in agreement.

Antonyms

• Liquid: A substance that flows freely but is of constant volume.
• Gaseous: Of or like a gas.
• Flimsy: Insubstantial and easily damaged.
• Unreliable: Not able to be trusted or depended on.

Related Phrases and Idioms

• "Get/be solid on something": To become sure or certain about something; to master it.
  • Make sure you are solid on the basics before moving on.
• "A solid hour/day/etc.": A full, uninterrupted period of time.
  • She practiced for a solid hour.

Adjective

1. acting together as a single undiversified whole
   • a solid voting bloc
2. of the same color throughout
   • solid color
3. meriting respect or esteem
   • an upstanding member of the community
4. of a substantial character and not frivolous or superficial
   • work of solid scholarship
   • based on solid facts
5. financially sound
   • the bank is solid and will survive this attack
6. impenetrable for the eye
   • solid blackness
7. having three dimensions
   • a solid object
8. not soft or yielding to pressure
   • a firm mattress
   • the snow was firm underfoot
   • solid ground
9. of good quality and condition; solidly built
   • a solid foundation
   • several substantial timber buildings
10. providing abundant nourishment
    • a hearty meal
    • good solid food
    • ate a substantial breakfast
    • four square meals a day
11. uninterrupted in space; having no gaps or breaks
    • a solid line across the page
    • solid sheets of water
12. of one substance or character throughout
    • solid gold
    • carved out of solid rock
13. entirely of one substance with no holes inside
    • a solid block of wood
14. of definite shape and volume; firm; neither liquid nor gaseous
    • ice is water in the solid state
15. characterized by good substantial quality
    • solid comfort
    • a solid base hit

Noun

1. a three-dimensional shape
2. the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape
3. matter that is solid at room temperature and pressure