Meaning of “though” - Learner’s Dictionary

though

conjunction uk us /ðəʊ/
INTRODUCE FACT

B1 used to introduce a fact or opinion that makes the other part of the sentence seem surprising:

And though she's quite small, she's very strong.
Nina didn't phone, even though she said she would.
BUT

B2 but:

They're coming next week, though I don't know when.

(Definition of “though conjunction” from the Cambridge Learner’s Dictionary © Cambridge University Press)