The patient was awake and alert about 3 hours after undergoing surgery.
Someone had better alert the police; we've been robbed.
You have to be very alert if you are driving at night in heavy rain.
Police have warned people to keep on the alert for a cougar which has
been sighted in the area.
The robber was spotted by an alert neighbor, who noticed him trying to climb in a window.
The school has been working hard to alert children to the dangers of talking to strangers.
He wasn't very alert in class today because he hardly slept at all
last night.
The day Sophie was born she was amazingly alert and aware of everything around her.
Charles Tobey once said that a democratic government is only as strong as the alert conscience of its people.
The Armed Forces have been put on full alert amid rumors of a planned
terrorist attack on the White House.
Wind tunnel studies alert car designers to specific areas of drag.
It's important to be alert when entering an intersection because there is often a lot of activity in these zones.
The doctor said the patient was alert, and doing well.
Even a mild illness like a cold or the flu can decrease one's alertness, making driving dangerous.
There is a proverb in the Philippines which states that alertness and courage are life's shield.
In May of 1980, U.S. nuclear forces twice went on red alert following a computer error warning of a Soviet attack.
According to the FBI, hospitals in Houston, San Francisco, Chicago and Washington have been alerted that they may be targets of a terrorist attack.