I. adverb
Synonyms: henceforth , henceforward
II. noun
1.
Synonyms: future , aftertime, afterward, by-and-by, offing, to-be
2.
an existence or place of existence after this life
buried pots and tools with the dead for use in the hereafter
Synonyms: afterlife, afterworld, beyond, otherworld
Idioms: great beyond ( or hereafter), life after death, next world ( or life), world beyond the grave, world to come
Contrasted words: here and now