シリアスしりあすCommon wordFreq.FrequencyTop 20,000Meanings1na-adjective, nounserious; earnest; graveUsed for situations, expressions, or attitudes that are not lighthearted or joking. Often implies a sincere, weighty, or solemn tone.彼かれはいつもシリアスな顔かおで仕し事ごとをしている。He always works with a serious expression.