Definition of で
で
de
Common word
particle
1.
at, in(indicates location of action; にて is the formal literary form)
2.
at, when(indicates time of action)
3.
by, with(indicates means of action)
conjunction
4.
and then, so
auxiliary
5.
and, then(only relevant for で)(indicates continuing action; alternative form of 〜て used for some verb types)
See also:て
particle
6.
let me tell you, don't you know(Kansai-ben (dialect))(only relevant for で)(at sentence-end; indicates certainty, emphasis, etc.)
See also:よ
Other readings:
にて