smiley

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++smile·y /ˈsmaɪli/ noun [countable]  a sign that looks like a face when you look at it sideways, for example :-), used in email messages to show that you are happy or pleased about something 笑容符〔电子邮件中使用的表示愉快或高兴的符号，如 :-)〕

smile·y nounChineseSyllable  

smiley
smile‧y /ˈsmaɪli/ noun [countable]
a sign that looks like a face when you look at it sideways, for example :-), used in email messages to show that you are happy or pleased about something

smileyBrE /ˈsmaɪli/ 🔊NAmE /ˈsmaɪli/ 🔊 nouna simple picture of a smiling face that is drawn as a circle with two eyes and a curved mouth 笑脸图（用 ☺︎ 表示）a simple picture or series of keyboard symbols :-) that represents a smiling face. The symbols are used, for example, in email or text messages to show that the person sending the message is pleased or joking. 微笑符（例如用 :-) 表示）