Definition of outgallop in US English:

outgallop

verb

  • with object To outdo in galloping; to gallop faster than.

Origin

Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. From out- + gallop.

Pronunciation

outgallop

/ˌaʊtˈɡaləp/