Ω

オ

メ

ガ

Common wordFreq.FrequencyTop 1,000

Meanings

noun

omega (Greek letter)

Refers to the last letter of the Greek alphabet, often used symbolically for the end or ultimate.

ギリシャ文も字じの最さい後ごはΩです。
The last letter of the Greek alphabet is omega.

noun

end; conclusion; finality

usually written using kana alone

Metaphorical use derived from omega as the last letter; often appears in phrases like アルファでありオメガである (the alpha and the omega). Usually written in kana.

彼かれはアルファでありオメガである。
He is the alpha and the omega.

noun

ohm (unit of electrical resistance)

physics

Only when written Ω

Physics term; restricted to the capital form Ω. Cross-referenced with オーム.

Related words

オーム sense 3
オーム is the standard Japanese name for the unit of electrical resistance, while オメガ (Ω) is used mainly to refer to its symbol rather than the spoken unit name.
角かく速そく度ど sense 4
角速度 is the Japanese term for angular velocity, while ω is the mathematical symbol conventionally used to represent it.

Opposites

α sense 1
アルファ is the first letter of the Greek alphabet and symbolizes the beginning, while オメガ is the last letter and symbolizes the end.

Written forms

Ω
Standard Greek capital letter form; used for the letter itself and the ohm unit.
ω
Lowercase form; used for angular velocity and sometimes for the letter itself.

Etymology

From Greek Ω/ω (omega). The metaphorical 'end' sense comes from omega being the last letter of the Greek alphabet. The physics senses are derived from the symbol's use in scientific notation.