Webster's Revised Unabridged Dictionary · 1913

Thereabout

Thereabout , adverb

[The latter spelling is less proper, but more commonly used.]

1.
Near that place.
2.
Near that number, degree, or quantity; nearly; as, ten men, or thereabouts.
Five or six thousand horse... or thereabouts. — Shakespeare
Some three months since, or thereabout. — Suckling
3.
Concerning that; about that. [Rare]
What will ye dine? I will go thereabout. — Chaucer
They were much perplexed thereabout. — Luke xxiv. 4

Also: Thereabouts