Definition of lulus:
(n) :
A remarkable person, object, or idea.
(n) :
A very attractive or alluring person.
(n) :
A very bad mistake or error.
(n) :
(slang) A fixed allowance paid to a legislator in lieu of reimbursement for actual expenses.
(n) :
A female given name.
(n) :
A diminutive of the female given names Louisa, Louise, Lucy, or Lucille.