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

• Arcangelo Corelli
• arcanum
• arccos
• arccosecant
• arccosine
• arccotangent
• arcdegree
• arced
• arcella
• Arcellidae
• Arceuthobium
• Arceuthobium pusillum
• arch
• arch over
• arch support
• archaean
• archaebacteria
• archaebacterium
• archaeo-
• archaeobacteria
• archaeologic
• archaeological
• archaeologically
• archaeologist
• archaeology