First

Definition of first:

part of speech: adverb

Before all others in order, place, rank, time, etc.; sooner.

part of speech: noun

Earliest; foremost; chief.

part of speech: adverb

Before anything else, in time, space, rank, etc.

part of speech: adjective

Before the rest.

part of speech: adjective

The ordinal of one; foremost in place, rank, dignity, time, excellence, etc.; earliest; most important; chief.

part of speech: noun

The beginning.

part of speech: adjective

Foremost; preceding all others in place, time, or degree; most eminent; chief.