Webster's Revised Unabridged Dictionary · 1913

Tho

Tho (tō) , def. art.

The. [Obsolete] — Spenser

Tho , pronoun, plural

Those. [Obsolete]
This knowen tho that be to wives bound. — Chaucer

Tho , adverb

[Anglo-Saxon þā.]

Then. [Obsolete] — Spenser
To do obsequies as was tho the guise. — Chaucer

Tho , conjunction

Though. [Reformed spelling.]