‘Dilute’ is a word that can be used correctly as an adjective or as a verb. In simple terms, it means to ‘make a liquid thinner by adding water or another solvent to it’. Verb: To make a liquid thinner or weaker by adding water or another solvent. Adjective: Describing something that has been made less concentrated or potent. Dilute is involved with reducing strength, concentration, or intensity. It’s a common term in science, cooking, and even figurative language. The simple definition of DILUTE is to make (a liquid) thinner or less strong by adding water or another liquid. Dilution is the process of reducing the concentration of a substance by adding more solvent, usually water. If you stir a spoonful of salt into a glass of water, then pour that glass into a pitcher and fill the rest with plain water, you’ve diluted your salt solution. Learn how to accurately dilute solutions with this simple guide. We explain how to calculate dilutions with a formula and how to make quick dilutions. DILUTE definition: to make (a liquid) thinner or weaker by the addition of water or the like. See examples of dilute used in a sentence. If you dilute a substance you make it weaker or less pure by mixing it with another substance. dilute 1. To mix a powder, e.g. flour, with a liquid. 2. To add water to a concentrated liquid. The meaning of DILUTE is attenuate. How to use dilute in a sentence. If you dilute a substance you make it weaker or less pure by mixing it with another substance.