光
Meaning in Englishlight, brightness
Animated kanji stroke order
Related sentences
Related sentences
There are no published items in this section yet.
Word context
What it means
What does 光 mean? It denotes light in the physical sense and the brightness that enables sight; it also refers to a source of illumination and can carry metaphorical meanings such as clarity, understanding, or hope, depending on the context.
Main meanings
- Light or illumination, the visible energy that makes things observable.
- Brightness or radiance of a source or surface.
- A beam or ray of light, used in phrases such as 光の線.
- Metaphorical brightness: insight, enlightenment, or hope in literature and speech.
- Common compound terms relating to light and optics, such as 光源 (光源, light source), 光年 (light-year), 光速 (speed of light).
How to use it
In daily speech it functions as a noun for light and brightness, in formal or scientific language it forms compounds such as 光源, 光速, 光年, and in literature and media it conveys hope or enlightenment; casual usage often describes ambient light or daylight, while technical contexts discuss properties of light without translating into other senses.
Variants and close terms
- 明かり (akari) — light, illumination
- 輝き (kagayaki) — brightness, radiance
- 光線 (kousen) — ray
- 光源 (kougen) — light source
- 光年 (kounen) — light-year
- 闇 (yami) — darkness (antonym)
Composition
光 is a single-kanji character; it visually represents brightness and radiance, with no subcomponents to decompose in this word.
Etymology
Etymology The kun-reading hikari/hikaru developed in native Japanese usage, while the on-reading kō was borrowed from Chinese guāng via Sino-Japanese phonology; the character itself is a simple ideogram representing brightness, and its readings reflect both native and Sino-Japanese adaptation.
Origin
光 appears in classical Japanese texts and poetry, used to denote daylight and illumination from lamps or the sun; with modernization it extended to scientific terms like 光源, 光速, and in everyday life remains a core word for brightness and visual clarity.
Word class
Noun (名詞)