First
Part of speech: adjective
Definition: Having no predecessor. The ordinal number corresponding to one.
Part of speech: adverb
Definition: Before anything else; firstly.
Part of speech: noun
Definition: The person or thing in the first position. The first gear of an engine. Something that has never happened before; a new occurrence. first base A first-class honours degree. A first-edition copy of some publication.
Example sentence: Setting goals is the first step in turning the invisible into the visible.
1st
Part of speech: abbreviation
Definition: first