Meaning of 五段 in Japanese

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Definition of 五段

ごだん(godan) 【五段】

ごだんどうし(godandoushi) 【五段動詞】

(n) godan verb (one of the two main conjugation classes of verbs in modern Japanese, usually ending in -u, -ku, -su, -tsu, -gu, -bu, -mu, etc.); type I verb →Related words: 一段動詞 , 話す

ごだんかつよう(godankatsuyou) 【五段活用】