¹ first adjective

• coming before all others in time, order, or importance
• —used to refer to the lowest forward gear or speed of a vehicle
• having or playing the main part in a group of instruments

² first adverb

• before any other in time, order, or importance
• for the first time
• before doing other things

³ first noun

• something that is first: such as
• an occurrence, achievement, etc., that happens or exists before any other of that kind
• the position of the winner in a competition or contest

⁴ first pronoun

• the first one or ones
• the first time