密度(みつど)

みつど
noun
density; concentration; intensity
sciencequantity
1. density (physical); concentration
The amount of a substance per unit of volume or area. A standard scientific term. Composed of 密 (dense) + 度 (degree).
水(みず)の密度(みつど)は約(やく)1g/cm³だ。
The density of water is approximately 1 g/cm³.
人口(じんこう)密度(みつど)が高(たか)い地域(ちいき)だ。
It is an area with high population density.
鉄(てつ)は木(き)より密度(みつど)が大(おお)きい。
Iron has a greater density than wood.
2. density; intensity; richness (figurative)
The degree of substance or content packed into something, such as time, a schedule, or a piece of work. Implies fullness or richness of content.
密度(みつど)の濃(こ)い一日(いちにち)だった。
It was a packed and productive day.
練習(れんしゅう)の密度(みつど)を上(あ)げる必要(ひつよう)がある。
We need to increase the intensity of practice.
密度(みつど)の高(たか)い授業(じゅぎょう)で疲(つか)れた。
I was tired after an intense, content-packed class.

Usage

The scientific sense (sense 1) is used in physics, chemistry, and geography. The figurative sense (sense 2) is common in everyday speech, describing how packed or rich with content something is.

Common collocations

  • 人口(じんこう)密度(みつど) (population density)
  • 密度(みつど)が高(たか)い (high density / packed with content)
  • 密度(みつど)の濃(こ)い (dense, rich — figurative)
  • 密度(みつど)を上(あ)げる (to increase intensity/density)

Related Words

Compare: 比重(ひじゅう) (specific gravity)
general
Added 2026.3.5 16:59 · Revised 2026.9.2 13:01
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