1. oncome - Noun
2. oncome - Verb
oncome (third-person singular simple present oncomes, present participle oncoming, simple past oncame, past participle oncome)
(intransitive, rare) To arrive; come to; come on.
Advent, arrival, approach; onset
The commencement or initial stages of a business, especially of one which requires great exertion.
The setting about of an action; development; progress.
An attack; an attack or onset of a disease, fit, or episode.
(dialectal) A mysterious disease or ailment.
(dialectal) A heavy fall of rain or snow; cloudburst.
(of a chimney) The lower edge of a fire-clay lining piece.
Source: en.wiktionary.org