1.A strong, active horse, of a middle size, said to have been originally from Ireland; an ambling nag.
2.A stick, often with the head or figure of a horse, on which boys make believe to ride. (Usually under the form hobbyhorse)
3.A subject or plan upon which one is constantly setting off; a favorite and ever-recurring theme of discourse, thought, or effort; that which occupies one's attention unduly, or to the weariness of others; a ruling passion. (Usually under the form hobby) "Not one of them has any hobbyhorse, to use the phrase of Sterne."
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