sentinel

Definition of Sentinel in English :

a person employed to keep watch for some anticipated event

WordNet Lexical Database for English. Princeton University. 2010.

Sentinel

noun

1.

a person, such as a sentry, assigned to keep guard

2. computing

a character used to indicate the beginning or end of a particular block of information

verb -nels, -nelling, -nelled or US -nels, -neling or -neled (transitive)

3.

to guard as a sentinel

4.

to post as a sentinel

5.

to provide with a sentinel

noun

1.

a person or animal set to guard a group; specif., a sentry

verb transitiveWord forms: ˈsentineled or ˈsentinelled, ˈsentineling or ˈsentinelling

2.

to guard or watch over as a sentinel

3.

to furnish or protect with a sentinel

4.

to post as a sentinel

n.

One that keeps guard; a sentry.

tr.v. sen·ti·neled, sen·ti·nel·ing, sen·ti·nels or sen·ti·nelled or sen·ti·nel·ling

1. To watch over as a guard.

2. To provide with a guard.

3. To post as a guard.