The Collaborative International Dictionary
Cockhorse \Cock"horse`\, a.
Lifted up, as one is on a tall horse.
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Lofty in feeling; exultant; proud; upstart.
Our painted fools and cockhorse peasantry.
--Marlowe.
Cockhorse \Cock"horse`\, n.
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A child's rocking-horse.
Ride a cockhorse to Banbury cross.
--Mother Goose. A high or tall horse. [R.]
Wiktionary
a. 1 Lifted up, as one is on a tall horse. 2 Lofty in feeling; exultant; proud; upstart. n. 1 (context archaic English) A child's rocking horse. 2 (context obsolete English) A high or tall horse.
WordNet
n. anything used as a toy horse (such as a rocking horse or one knee of an adult)
Usage examples of "cockhorse".
Here he had the felicity of seeing Lord Coleraine, Georgy a Cockhorse, prancing down Rotten Row on his mettlesome steed.