Synonyms of 'by heart'
▷ See heart
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If you learn or repeat something parrot-fashion, you do it accurately but without really understanding what it means.
Pupils had to repeat their verb tables parrot-fashion.
Thesaurus for by heart from the Collins English Thesaurus
If you know something such as a poem by heart , you have learned it so well that you can remember it without having to read it.