Meaning

noun an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation

adverb (used to introduce a logical conclusion) from that fact or reason or as a result

adverb in the way indicated; ; ; (`thusly' is a nonstandard variant)

originFrom Middle English thus, þus, from Old English þus (“thus, in this way, as follows, in this manner, to this extent”), from Proto-West Germanic *þus (“so, thus”), perhaps originally from a variant of the instrumental form of this, related to Old English þȳs (“by this, with this”), Old Saxon thius (“by this, with this”). Cognate with Scots thus (“thus”), North Frisian thus, Saterland Frisian dus,…

Etymology from Wiktionary, CC BY-SA 3.0