I. dis ‧ card 1 /dɪsˈkɑːd $ -ɑːrd/ BrE AmE verb
[ Date: 1700-1800 ; Origin: dis- + ⇨ ↑ card 1 (5) ]
1 . [transitive] to get rid of something SYN throw away :
Discard any old cleaning materials.
discarded paper
2 . [intransitive and transitive] to put down unwanted cards in a card game
II. dis ‧ card 2 /ˈdɪskɑːd $ -ɑːrd/ BrE AmE noun [countable]
an unwanted card that is put down in a card game