Definition of in:
a unit of length equal to one twelfth of a foot
a rare soft silvery metallic element; occurs in small quantities in sphalerite
a state in midwestern United States
holding office; "the in party"
directed or bound inward; "took the in bus"; "the in basket"
currently fashionable; "the in thing to do"; "large shoulder pads are in"
to or toward the inside of; "come in"; "smash in the door"