pron

• (rare) A third-person singular pronoun used to refer to an unspecified person.
  "All these things inclined her, step by step, to submit to the new discovery, whether Queen Victoria's or another's, that each man and each woman has another allotted to it for life, whom it supports, by whom it is supported, till death them do part."
• (obsolete) An affectionate third-person singular personal pronoun.
  ""[…] It's my belief that you don't know your own mind." "I don't, dear," said Hulda, nestling to him. "Why, what a puss it is!" cried Sir Philip, kissing her tenderly."
• (chiefly derogatory, offensive) A third-person singular personal pronoun used to refer to an animate referent who is transgender or non-binary.
  "1977-1980, Lou Sullivan, personal diary, quoted in 2019, Ellis Martin, Zach Ozma (editors), We Both Laughed In Pleasure Next morning bought her [a drag queen] breakfast & she asked for a couple dollars to get a drink. Gave her $3, walked her to a bar. […] Some teenage boys watched us walking & began shouting. When I left her at the bar door & kissed her goodbye, they began shouting "Ugh! You kissed it!!""
• (uncountable) Sex appeal, especially that which goes beyond physical appearance.
  "'Tisn't beauty, so to speak, nor good talk necessarily. It's just It. Some women'll stay in a man's memory if they once walked down a street"

det

• (obsolete) Its.
  "That which groweth of it owne accord of thy haruest, thou ſhalt not reape, neither gather the grapes of thy Uine vndreſſed: for it is a yeere of reſt vnto the land."

noun

• (British) A game of tag.
  "Let's play it at breaktime."
• (informal) A desirable characteristic, as being fashionable.
  "Man, he's really got it."
• (informal) Sexual intercourse.
  "OMG, they were doing it in the storage room."
• (informal) Sex appeal.
  "She really has it going on."

adj

• (colloquial) Most fashionable, popular, or in vogue.
  "Going away for the weekend and feel the need to profile en route? This is the "it" bag."