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Webster 1913 Edition
Imperatival
Im-perˊa-ti′val
(ĭm-pĕrˊȧ-tĭ′val)
, Adj.
 (Gram.) 
Of or pertaining to the imperative mood. 
Definition 2025
imperatival
imperatival
English
Adjective
imperatival (comparative more imperatival, superlative most imperatival)
- (grammar) Of or pertaining to the imperative mood