saint /seɪnt/ BrE AmE noun [countable]
[ Date: 1100-1200 ; Language: Old French ; Origin: Late Latin sanctus , from Latin , 'holy' , from the past participle of sancire 'to confirm, make holy' ]
1 . ( written abbreviation St or St. ) someone who is given the title ‘saint’ by the Christian Church after they have died, because they have been very good or holy:
Saint Patrick
Statues of saints lined the walls of the church.
2 . informal someone who is extremely good, kind, or patient:
His wife must have been a saint to put up with him for all those years.
3 . the patience of a saint a very large amount of patience:
You need the patience of a saint for this job.