adj.
Function: adverb
Date: before 12th century
1 a : in or into a position of contact with an upper surface especially so as to be positioned for use or operation <put the plates on > b : in or into a position of being attached to or covering a surface especially : in or into the condition of being worn <put his new shoes on >
2 a : forward or at a more advanced point in space or time <went on home> <later on > b : in continuance or succession <rambled on > <and so on >
3 : into operation or a position permitting operation <switched the light on >