What is the meaning of Siden?

since, later (on), afterwards, in the time since then

since, ago (referring to the length of time between some past event and the (narrative) present)

ago (referring to a point in time a definite amount of time in the past)

since (temporal)

since (causal)

since

definite singular of side

since

afterwards, later

presently, by and by

then

ago (for ... siden)

since

definite masculine singular of side

plural of side

Source: wiktionary.org