1. a cat, especially an old female cat
Usage: often used affectionately or humorously; archaic or literary
2. an ill-tempered or malicious old woman
Usage: archaic; derogatory

Examples

• The old grimalkin stretched lazily in the sunlight.
• She petted the grimalkin that had wandered into her garden.
• In the play, the three witches were accompanied by a grimalkin.
• The grimalkin purred contentedly on the windowsill.
• He called the elderly woman a grimalkin, which was unkind.