Definition of horehound
1a : an Old World bitter perennial mint (Marrubium vulgare) with downy leavesb : an extract or confection made from the dried leaves and flowering tops of this plant
2 : any of several mints resembling the horehound
Recent Examples of horehound from the Web
Volunteers like Wright remove invasive plant species such as fennel, pampas grass, castor bean, fountain grass, horehound, Sahara mustard, tecolote.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'horehound'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Medical Definition of horehound
1: a European aromatic mint (Marrubium vulgare) that is naturalized in the United States, has pubescent leaves and small axillary flowers, has a very bitter taste, and is used as a tonic and anthelmintic—called also white horehound
2: an extract or confection made from horehound and used as a remedy for coughs and colds
Seen and Heard
What made you want to look up horehound? Please tell us where you read or heard it (including the quote, if possible).