noun, adverb
behind others; inferior to others
Almost always used in the negative phrase 人後に落ちない, meaning 'not inferior to others' or 'second to none'. Rarely used independently.
彼は努力では人後に落ちない。
He is second to none in effort.
彼女の語学力は人後に落ちないものだ。
Her language skills are not inferior to anyone's.