Swell/swel/ Definition 1 of 6Pro Tip 1/3Physical Change Used to describe something increasing in size due to pressure, injury, or growth. Her cheeks swelled with air as she blew into the balloon. Pro Tip 2/3Not Always Visible The swelling might not be externally apparent but can refer to internal enlargement. After eating too much, his stomach felt swollen. Pro Tip 3/3Metaphorical Use Can metaphorically describe an increase in emotions or feelings. Pride swelled in her chest as she watched her students perform.