solid

B1 · Intermediate

adj. made of the same material all the way through, with no holes or empty space inside.

adj. not hollow or containing gaps; consisting entirely of a specific substance throughout its volume.

“The door was made of solid oak, making it very heavy and strong.”

“The sculpture was carved from a solid block of marble, ensuring there were no structural weaknesses or internal fissures.”

B2 · Upper Intermediate

adj. reliable, dependable, or of good quality.

adj. dependable and of high quality; providing a sound basis for trust or further action.

“She gave a solid performance in the play and the audience loved her.”

“The researcher provided solid evidence to support her theory, convincing even the most skeptical members of the board.”

B2 · Upper Intermediate

adj. without any gaps or interruptions.

adj. continuous in time or space; without breaks or punctuation.

“The rain continued for three solid days, causing the river to overflow.”

“He worked for eight solid hours without a break to ensure the project was finished before the deadline.”

B1 · Intermediate

adj. having only one color all over, without any patterns or stripes.

adj. of a single uniform color throughout; lacking patterns, stripes, or variegation.

“I prefer wearing solid colors like blue or black rather than busy patterns.”

“The interior designer recommended solid curtains to balance the intricate floral wallpaper in the master bedroom.”

B1 · Intermediate Countable noun Science

n. a substance that stays in the same shape and does not flow like a liquid.

n. a substance in a physical state characterized by structural rigidity and resistance to changes in shape or volume.

“The teacher asked the students to list three examples of solids found in the classroom.”

“In physics, a solid is defined by its ability to maintain a fixed volume and shape regardless of its container.”

C1 · Advanced Countable noun Informal · Slang

n. a helpful act or a favor for someone.

n. a favor or helpful act performed for another person.

“Could you do me a solid and watch my dog while I go to the store?”

“He asked his colleague to do him a solid by covering his shift on Friday afternoon.”