秋|あきaki[1]atamadaka (head-high)

1. noun, adverbautumn; fall
   秋あきには木の葉このはが落おちる。↗

   Leaves fall in the autumn.

• Synonym秋季しゅうきWrittenWritten/formal term for the autumn season, as in 「秋季大会」; same meaning as 「秋」 but more formal, used in official names.
• Synonym秋期しゅうきWrittenWritten/formal word for autumn as a set period, as in 「秋期講習」; used for school and institutional schedules rather than the season in general.
• SynonymオータムNeutralNeutral loanword, mostly in compounds like 「オータムセール」; it can stand alone but is much less common than 「秋」.
• Related秋日しゅうじつWrittenLiterary, elegant word for an autumn day or autumn daytime, found mainly in poetry and formal prose; not for everyday speech.
• Antonym春はるNeutralThe season opposite 「秋」: spring, one of the four seasons; neutral in register.

Use 「秋」 for autumn in everyday speech and writing. For formal names pick 「秋季」 (「秋季大会」), for school or institutional terms 「秋期」 (「秋期講習」), and 「オータム」 mainly in compounds like 「オータムセール」. 「秋日」 is literary; 「春」 is the opposite season.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （あき）季節きせつの一ひとつ。夏なつの次つぎ、冬ふゆの前まえ。
2. 年ねんの意味いみ