The definition of alike is having similarities.(adjective)
Lions and tigers are an example of two things that are alike.
See alike in Webster's New World College Dictionary
Origin: ME olike < OE gelic, onlike & ON (g)likr, alikr < PGmc *galik- < *ga- (< IE *ge-, perfective prefix) + *lik-: see like
See alike in American Heritage Dictionary 4
Origin: Middle English alich (influenced by Old Norse ālīkr)
Origin: , blend of ilich (from Old English gelīc)
Origin: and anlich (from Old English onlīc); see līk- in Indo-European roots.
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