FOURTHLY
fourthly, fourth
(adverb) in the fourth place; “fourthly, you must pay the rent on the first of the month”
Source: WordNet® 3.1
Etymology
Adverb
fourthly (not comparable)
In the fourth place; fourth in a row.
Source: Wiktionary
Fourth"ly, adv.
Definition: In the fourth place.
FOURTH
Fourth, a. Etym: [OE. fourthe, ferthe, feorthe, AS. feĂłredha, fr.
feĂłwer four.]
1. Next in order after the third; the ordinal of four.
2. Forming one of four equal parts into which anything may be
divided.
Fourth, n.
1. One of four equal parts into which one whole may be divided; the
quotient of a unit divided by four; one coming next in order after
the third.
2. (Mus.)
Definition: The interval of two tones and a semitone, embracing four
diatonic degrees of the scale; the subdominant of any key. The
Fourth, specifically, un the United States, the fourth day of July,
the anniversary of the declaration of American independence; as, to
celebrate the Fourth.
Source: Webster’s Unabridged Dictionary 1913 Edition