Simple Definition of refractory

from our Learner's Dictionary

refractory

adjective

rɪˈfræktəri $How to pronounce refractory (audio)$

1

medical : difficult to treat or cure

a refractory disease

2

formal : difficult to control or deal with

a refractory [=disobedient] child

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“Refractory.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/refractory. Accessed 21 Jun. 2026.

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