優婆塞  / yōu pó sāi /
Upasaka 
Category:
Buddhist Terminology 
Description:
優婆塞即在家親近奉事三寶、受持五戒的男居士。
An upasaka is a lay Buddhist man
who has taken refuge in the Triple Gem and has taken the Five Precepts.
References:
星雲大師全集【書法類】中華文化佛教名詞 名相 The Complete Works of Venerable Master Hsing Yun: Calligraphy-Terminology 
高雄市大樹區興田里興田路 153 號
886-7-6561921 #2501-2506