denser

Denser is the comparative form of the adjective dense. It describes greater density, that is, a higher mass per unit volume, or a higher concentration of particles or objects. The word dense derives from Latin densus via Old French, reflecting its sense of thickness or compactness.

In science and everyday speech, denser is used to compare two things. Examples: "Iron is denser than aluminum." "The fog grew denser." "The city is denser than the countryside." Densities are used in physics, materials science, meteorology, astronomy, and demography, among other fields. In demography, density refers to people per unit area, so a metropolis is denser than a rural region.

Grammar note: Denser is the standard comparative form of dense and is typically used with than, as in "denser than." The superlative form is densest. While some speakers may say "more dense" in formal prose, "denser" remains the preferred form in most contemporary usage.