1.One who labors hard and lives meanly; a mean fellow. "A sorry scrub." "We should go there in as proper a manner as possible; nor altogether like the scrubs about us."
2.Something small and mean.
4.A thicket or jungle, often specified by the name of the prevailing plant; as, oak scrub, palmetto scrub, etc.
5.(Stock Breeding) One of the common live stock of a region of no particular breed or not of pure breed, esp. when inferior in size, etc. (U.S.)
7.(Forestry) A low, straggling tree of inferior quality.