(intransitive) To frolic, to act mischievously. (Usually followed by "around".) / (transitive) To play mischievous pranks on. / (transitive) To provide with a horse; supply horses for.

(uncountable, slang) Heroin (drug).

plural of horse blanket

A blanket placed underneath the saddle of a horse. / (obsolete, slang) currency in the 1800s consisting of large size notes/bills.

Alternative spelling of hunting horn

(music) A bugle, being either simply curved (especially in heraldry), or having from one (in e.g. some Roman horns) to three (in many modern musical horns) spirals, on which signals are blown during a hunt.

A polypeptide hormone, secreted by the pituitary gland in many animals including humans, that promotes growth and regulates the metabolism of carbohydrates, proteins and lipids.

An American breed of horse originally bred for short-distance racing.

(biochemistry) Any of many substances, produced by plants, that control or regulate their germination, growth, metabolism etc.

(genetics) The transfer of genetic material from one organism to another one that is not its offspring; especially common among bacteria.