armchair
US /ˈɑːrm.tʃer/
UK /ˈɑːrm.tʃer/

1.
a comfortable chair with sides that support your arms
:
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He relaxed in his favorite armchair by the fireplace.
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The living room has a sofa and two matching armchairs.
1.
done or experienced by reading or watching rather than by doing it oneself
:
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He's an armchair critic who never actually tries to create anything.
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She enjoys armchair travel, reading books and watching documentaries about distant lands.