Definition of Grandmotherly

Babylon English Dictionary
of a grandmother, characteristic of a grandmother
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Grandmotherly Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(a.)
Like a grandmother in age or manner; kind; indulgent.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
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grandmotherly
\grand"moth"er*ly\, a. like a grandmother in age or manner; kind; indulgent.