one

definition: eminent beyond or above comparison
example:
speech part: adjective
synonyms: nonpareil
definition: indefinite in time or position
example:
speech part: adjective
synonyms:
definition: used informally as an intensifier
example:
speech part: adjective
synonyms:
definition: of the same kind or quality
example:
speech part: adjective
synonyms:
definition: having the indivisible character of a unit
example:
speech part: adjective
synonyms: unitary
definition: being a single entity made by combining separate components
example: three chemicals combining into one solution
speech part: adjective
synonyms:
definition: used of a single unit or thing
example:
speech part: adjective
synonyms: i ane
definition: a single person or thing
example: They are the best one.
speech part: noun
synonyms:
definition: the smallest whole number or a numeral representing this number
example: I have the one guitar but I need a second and a third to go with it.
speech part: noun
synonyms: single

one is explained and pronounced

How one is being used?