大台(おおだい)

おおだい
noun
major milestone, round-number threshold
quantity
1. major milestone, round-number threshold
A significant round number used as a benchmark, especially in contexts involving money, statistics, age, or scores. Originally a stock market term for price levels in units of 1,000 yen, now used broadly for any notable numerical milestone.
売(う)り上(あ)げが1億円(おくえん)の大台(おおだい)に乗(の)った。
Sales reached the 100 million yen mark.
来年(らいねん)、父(ちち)は年齢(ねんれい)の大台(おおだい)を超(こ)える。
Next year, my father will pass a major age milestone.
日経平均(にっけいへいきん)が4万円(まんえん)の大台(おおだい)を突破(とっぱ)したと報道(ほうどう)された。
It was reported that the Nikkei average broke through the 40,000 yen threshold.

Usage

Almost always used with 大台(おおだい)に乗(の)る (to reach a milestone) or 大台(おおだい)を超(こ)える / 突破(とっぱ)する (to break through a milestone). The specific number is usually stated or implied from context. Originally from stock trading terminology.

Common collocations

Etymology

Originally a stock market term referring to price levels in units of 1,000 yen. Now used in everyday language for any significant round-number threshold (100 million yen in sales, age 60, population milestones, etc.).

general
Added 2026.2.20 22:38 · Revised 2026.9.2 13:01
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