monitor

B2 · Upper Intermediate Countable noun

n. someone whose job is to watch a situation to make sure it is fair or safe.

n. an individual appointed to supervise, observe, or verify the conduct of a specific process or group.

“The exam monitor walked around the room to make sure no one was talking.”

“International monitors were deployed to the region to oversee the election and ensure the voting process remained transparent.”

B1 · Intermediate Countable noun Medicine

n. a piece of equipment that checks and shows information, like your heart rate.

n. an instrument or device used for observing, checking, or keeping a continuous record of a process or quantity.

“The nurse checked the heart monitor to see if the patient was sleeping well.”

“The technician calibrated the radiation monitor before entering the laboratory to ensure the safety of the research team.”

B1 · Intermediate

v. to watch something carefully over a period of time to see how it changes.

v. to observe and check the progress or quality of something over a period of time; to keep under systematic review.

“The doctors will monitor her condition closely for the next twenty-four hours.”

“The environmental agency continues to monitor air quality levels in the city to determine the impact of the new traffic regulations.”

C1 · Advanced Countable noun Science Technical

n. a type of large lizard found in Africa, Asia, and Australia.

n. any of various large tropical lizards of the genus Varanus, known for their powerful builds and predatory nature.

“We saw a large monitor sunning itself on a rock near the river.”

“The Komodo dragon is the largest extant species of monitor, reaching lengths of up to three metres in the wild.”

C2 · Proficiency Countable noun Archaic · Technical

n. a small, slow warship with very large guns used near the coast.

n. a relatively small, slow-moving armoured warship designed for coastal bombardment rather than naval combat.

“The museum has a model of a nineteenth-century monitor used in the war.”

“The shallow draft of the monitor allowed it to navigate river estuaries that were inaccessible to the larger ships of the line.”