what does it mean when someone says or writes I.e.?
I.e is an abreviation for "id est" which in Latin means "that is" typically means "that is" "such as" or "in other words"
Other common Latin abreviations are:
e.g. "Exempli Gratia" which means "free example" used to mean "for example"
etc. (sometimes \&c) Et Cettera" which means "and the rest" but is used to mean "and so on"
et al "Et Alii" And others. Used when a list of people is longer than you wish to list. When a book has many authors it is common to write the first one followed by "et al" to indicate one of many.
It means Example most likely in the context your referring to.
I only know 2 meanings:
it means "that is"