SENTINEL

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 Dictionary entry overview: What does sentinel mean? 

• SENTINEL (noun)
  The noun SENTINEL has 1 sense:

1. a person employed to keep watch for some anticipated event

  Familiarity information: SENTINEL used as a noun is very rare.

 Dictionary entry details 

• SENTINEL (noun)

Sense 1

Meaning:

A person employed to keep watch for some anticipated event

Classified under:

Nouns denoting people

Synonyms:

lookout; lookout man; picket; scout; sentinel; sentry; spotter; watch

Hypernyms ("sentinel" is a kind of...):

security guard; watcher; watchman (a guard who keeps watch)

 Context examples 

That dreadful sentinel sent a chill to my heart which I do not think that any burglar could have done.

(The Adventures of Sherlock Holmes, by Sir Arthur Conan Doyle)

"But not without a sentinel," said Lord John, with decision.

(The Lost World, by Sir Arthur Conan Doyle)

A dye made in the laboratory that helps identify the sentinel lymph node (the first lymph node that cancer spreads to from a primary tumor).

(Isosulfan blue, NCI Dictionary)

Injected into the periphery of the tumor site, isosulfan blue localizes to the lymphatic system and aids in the surgical identification of tumor sentinel nodes which stain blue.

(Isosulfan blue, NCI Thesaurus)

Patent blue V dye is used in sentinel lymph node (SLN) technique to guide nodal dissection or other imaging procedures.

(Patent Blue V Dye, NCI Thesaurus)

The classification is based on axillary lymph node dissection with or without sentinel lymph node biopsy.

(Breast Cancer Pathologic Regional Lymph Nodes TNM Finding v7, NCI Thesaurus)

Jo was dismissed, but chose to march up and down the hall like a sentinel, having some fear that the prisoner might bolt.

(Little Women, by Louisa May Alcott)

Because I recognized their sentinel when I glanced out of my window.

(The Return of Sherlock Holmes, by Sir Arthur Conan Doyle)

A surgical procedure in which the axillary lymph node group is dissected and removed without prior removal and examination of the sentinel lymph node.

(Axillary Lymph Node Dissection without Prior Sentinel Lymph Node Biopsy, NCI Thesaurus)

These two girls had been above an hour in the place, happily employed in visiting an opposite milliner, watching the sentinel on guard, and dressing a salad and cucumber.

(Pride and Prejudice, by Jane Austen)