gum
US /ɡʌm/
UK /ɡʌm/

1.
a sticky substance, especially one that is chewed for a long time for its flavor or to strengthen the teeth
:
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He chewed a piece of bubble gum.
•
Please dispose of your chewing gum properly.
2.
the firm, fleshy tissue that covers the alveolar processes of the jaws and surrounds the necks of the teeth
:
•
Brush your teeth and gums twice a day.
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Inflamed gums can be a sign of gingivitis.