1. In contact with, on top of
   "the book upon the table"
   - on

1. Being up to particular standard or level especially in being up to date in knowledge
   "up on the news"
   - abreast, au courant, au fait, apace [N. Amer]

See also: informed

Encyclopedia: Upon

• penury
• Penutian
• peon
• peonage
• peony
• peony family
• people
• People against Gangsterism and Drugs
• people in power
• people of color
• people of colour
• People's Liberation Army
• People's Mujahidin of Iran
• People's Party
• People's Republic of Bangladesh
• People's Republic of China
• People's Republican Army
• peopled
• peoples
• Peoria
• pep
• pep pill
• pep rally
• pep talk
• pep up