FIRST MOMENT. The very beginning of something. The Big Bang had a first moment but although it was very small, many things happened. The history of the Universe begins at 10*-49 seconds and before the start of the expansion already produce a series of physical-chemical processes of infinitely short duration, as was the destruction of anti-matter. There are other first moments much less brief but lasting one or a few seconds, such as the instant someone is known. Some synonyms, words or similar expressions may be first, beginning
