up on   (TTS Sound)

The up_on has 1 Senses.

• up on, au fait, abreast, au courant
• being up to particular standard or level especially in being up to date in knowledge; "kept abreast of the latest developments"; "constant revision keeps the book au courant"; "always au fait on the latest events"; "up on the news"
• 特に知識が最新であることにおいて、特定の水準あるいはレベルにあるさま