1. The Material: This is the most common meaning. Concrete refers to a construction material made by mixing cement, aggregate (sand, gravel, or crushed stone), and water. This mixture hardens over time, creating a strong and durable material used for foundations, roads, and buildings.
2. Specific and Detailed: "Concrete" can also mean specific, clear, and detailed. It's used to describe something that is not abstract or vague.
* Example: "Instead of giving general advice, please give me some concrete suggestions."
3. Solid: "Concrete" can also mean firm, solid, and real.
* Example: "She has a concrete plan to achieve her goals."
4. Noun: Less commonly, "concrete" can be a noun referring to the material itself.
* Example: "The foundation of the house is made of concrete."
So, the meaning of "concrete" depends on the context. If you're unsure, consider the surrounding words and the overall meaning of the sentence.