Meaning

• Imagination; fancy.

• An imaginary quantity.

• The set of values, institutions, laws, and symbols common to a particular social group and the corresponding society through which people imagine their social whole.

Meaning

• Existing only in the imagination.

  "Santa Claus is imaginary."

• (of a number) Having no real part; that part of a complex number which is a multiple of the square root of -1.