val ‧ en ‧ tine /ˈvæləntaɪn/ BrE AmE noun [countable]
[ Date: 1400-1500 ; Origin: Saint Valentine 3rd-century Italian priest ]
1 . someone you love or think is attractive, that you send a card to on St Valentine’s Day:
Be my valentine.
2 . a card you send to someone on St Valentine’s Day