'Fourthly' definitions:

Definition of 'fourthly'

From: WordNet
adverb
In the fourth place; "fourthly, you must pay the rent on the first of the month" [syn: fourthly, fourth]

Definition of 'Fourthly'

From: GCIDE
  • Fourthly \Fourth"ly\, adv. In the fourth place. [1913 Webster]