Small image used in Facebook chats

• Happy face, e.g
• Smiley face in a text, e.g
• Face with tears of joy, for one
• Modern pictograph
• The Oxford Dictionaries 2015 "Word" of the Year is one
• Smiley face or frowny face
• Many a smiley face
• It may add feeling to a text

Wiktionary Word definitions in Wiktionary
n. Any of the standardized ideogrammatic icons used in Japanese text messaging (which have since been adopted internationally).