Word: 妹妹 (mèimei) 妹妹 dictionary entry mèimei younger sister; young woman Full dictionary entry for 妹妹 Example sentences using 妹妹 2 sentences, showing page 1 of 1. 我帮我妹妹做作业。 Wǒ bāng wǒ mèimei zuò zuòyè. I help my little sister do her homework. 我有一个妹妹。 Wǒ yǒu yí gè mèimei. I have a younger sister.