From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( adv.) In a particular manner; expressly; with a specific reference or interest; in particular; distinctly.

(2): ( adv.) In an especial manner; in a high degree; as, a particularly fortunate man; a particularly bad failure.

King James Dictionary [2]

Partic'Ularly, adv. Distinctly singly.

1. In an especial manner.

This exact propriety of Virgil I particularly regarded as a great part of his character.