Back then, at the time referred to in the past.

A surname.

Alternative form of Thatch weave / Used other than figuratively or idiomatically: see thatch, weave.

Alternative form of Thatch weave

(military, aviation) An air combat maneuver, to use when an enemy is chasing one of a pair of alliied aircraft. The chasee weaves back and forth in a path, to lead the chaser into a position, so that the wingmate of the chasee can maneuver in a reciprocal weave, to target the chaser body-on.

(humorous) That explains everything (in response to a satisfactory explanation).

(idiomatic) That ever lived.

Synonym of that'll be the day (“said in reply to something that one believes will never happen”)

Used to present an antecedent to a claim. / Used to refer to a situation under discussion.

Synonym of that tears it