Meaning of “asthma” - Learner’s Dictionary

asthma

noun [ U ] us uk /ˈæsmə/

an illness that makes it difficult to breathe:

She had an asthma attack.
asthmatic adjective us uk /æsˈmætɪk/

an asthmatic child

(Definition of “asthma” from the Cambridge Learner’s Dictionary © Cambridge University Press)