Noun
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an auxiliary verb (such as `can' or `will') that is used to express modality
- modal auxiliary verb - modal auxiliary - modal verb
Adjective
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relating to or expressing the mood of a verb
"modal auxiliary"
-
of or relating to a musical mode
especially written in an ecclesiastical mode
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relating to or constituting the most frequent value in a distribution
"the modal age at which American novelists reach their peak is 30"