¹ above adverb

• in or to a higher place
• in or to a higher rank or number
• above zero

² above preposition

• in or to a higher place than (something) : over
• greater in number, quantity, or size than (something) : more than (something)
• to a greater degree or extent than (something)

³ above adjective

• mentioned at an earlier point in the same document : written above