sentinel. n. 1. a person, such as a sentry, assigned to keep guard. 2. (Computer Science) computing a character used to indicate the beginning or end of a particular block of information. vb (tr) , -nels, -nelling or-nelled.
1 Victory Sign is a full-service sign company. We specialize in all aspects of the sign industry from survey and permitting, fabrication, installation and service. 2  We are a small company, but pride ourselves on quality workmanship and reasonable prices. We are fully insured and provide our customers with free estimates.
How the thumbs up became an upbeat gesture in the first place is something of a mystery. Legend has it that the signal dates back to Roman gladiatorial contests.A beaten combatant could supposedly be saved from a death blow if the emperor gave the thumbs up; a thumbs down was tantamount to an execution order.ow the thumbs up became an upbeat gesture in the first place is something of a mystery. Legend has it that the signal dates back to Roman gladiatorial contests.