世界一(せかいいち)

せかいいち
noun, adverb
best in the world; number one in the world
1. best in the world; number one in the world
The top rank or highest degree among all countries or people in the world. Used as a noun to describe the top position, or adverbially to mean 'the most in the world.'
世界一(せかいいち)になりたい。
I want to be the best in the world.
この山(やま)は世界一(せかいいち)高(たか)い。
This mountain is the tallest in the world.
彼女(かのじょ)は自分(じぶん)の子供(こども)が世界一(せかいいち)可愛(かわい)いと思(おも)っている。
She thinks her child is the cutest in the world.

Usage

Functions as both a noun and an adverb. As a noun: 世界一(せかいいち)を目指(めざ)す (to aim for number one in the world). As an adverb: 世界一(せかいいち)美(うつく)しい (the most beautiful in the world). Very common in everyday conversation, sports commentary, and advertising.

Common collocations

  • 世界一(せかいいち)を目指(めざ)す (to aim to be the best in the world)
  • 世界一(せかいいち)の記録(きろく) (world record)
  • 世界一(せかいいち)幸(しあわ)せ (the happiest in the world)

Similar words

  • 日本一(にほんいち): the best in Japan — same pattern but limited to Japan
  • 世界最高(せかいさいこう): the world's best — a more formal expression

Related Words

Related: 日本一(にっぽんいち) (best in Japan)
general
Added 2026.3.13 15:44 · Revised 2026.9.2 13:01
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