phrase → see You can use seeing that or seeing as to introduce a reason for what you are saying. [mainly British, informal, spoken]
⇒ He is in the marriage bureau business, which is mildly ironic seeing that his dearest
wish is to get married himself.
⇒ Seeing as Mr Moreton is a doctor, I would assume he has a modicum of intelligence.
COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers