The definition of tight is firmly in place, fitting closely or concise and strong.(adjective)
Tight is defined as firmly or securely.(adverb)
An example of tight used as an adverb is the phrase sit tight which means to remain seated.
See tight in Webster's New World College Dictionary
Origin: ME, altered (prob. infl. by toght: see taut) < thight < OE -thight, strong, akin to ON thēttr, Ger dicht, tight, thick < IE base *tenk-, to thicken, congeal > MIr tēcht, coagulated
Origin: < tight
See tight in American Heritage Dictionary 4
adjective tight·er, tight·est
Origin: Middle English, dense
Origin: , of Scandinavian origin.
Learn more about tight