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keep a sharp lookout (for something or someone)

To remain vigilant or carefully watchful (for something or someone). They should be arriving any minute, so keep a sharp lookout. Keep a sharp lookout for a Christmas present we could give your mother. Keep a sharp lookout for the health inspector, we heard he'll be doing a surprise inspection someday soon.

be on the lookout

Watching for something or someone. Be on the lookout for my email! It will have all the instructions you need for the project. A: "What are you guys doing?" B: "We're on the lookout for mom's car, so we can tell dad to stop working on her surprise gift when she gets here."
See also: lookout, on

look out (of) something

to gaze outward from inside something. (Of is usually retained before pronouns.) Look out of the window and see if it is raining. I looked out of the door to see what the weather was like.
See also: look, out

on the lookout (for someone or something)

watchful for someone or something. Be on the lookout for signs of a storm. I'm on the lookout for John, who is due here any minute.
See also: lookout, on

keep an eye out for

Also, keep a sharp lookout for. Be watchful for something or someone, as in Keep an eye out for the potholes in the road, or They told him to keep a sharp lookout for the police. The first expression, sometimes amplified to keep a sharp eye out for, dates from the late 1800s, the variant from the mid-1700s. Also see have one's eye on, def. 1; keep a weather eye; keep one's eyes open; look out.
See also: eye, keep, out

look out

Also, watch out. Be careful, be watchful, as in Look out that you don't slip and fall on the ice, or Watch out! There's a car coming. [c. 1600] Also see look out for.
See also: look, out

on the lookout

Also, on the watch. Vigilant, alert, as in Be on the lookout for the twins-they're somewhere on this playground, or He was on the watch for her arrival. Both phrases were originally used with upon. Upon the lookout was originally nautical usage, meaning "on duty being watchful" (as for another ship, rocks, or land); it appeared in the mid-1700s, and on replaced upon about a century later. Upon the watch was first recorded in Daniel Defoe's Robinson Crusoe (1719), and on the watch in Jane Austen's Sense and Sensibility (1797).
See also: lookout, on

keep an eye out (or open) for

look out for something with particular attention.
1996 Guardian Keep an eye open for kingklip, a delectable fish, and the superb local hake.
See also: eye, keep, out

be on the lookout

1 keep searching for someone or something that is wanted. 2 be alert to danger or trouble.
The word lookout , which originated in naval and military contexts, was first applied, in the late 17th century, to sentries or other people employed to keep watch. The sense of ‘the action of keeping watch’, as used in this expression, dates from the mid 18th century.
See also: lookout, on

be ˈsb’s (own) lookout

(British English, informal) be somebody’s problem because they are responsible for causing it: If he wants to invest all his money in one company, that’s his lookout.It’s my own lookout if I fail this exam.
See also: lookout

be on the ˈlookout (for somebody/something)


keep a ˈlookout (for somebody/something)

be searching (for somebody/something): We’re always on the lookout for good computer programmers.I’m on the lookout for a good book on German history.
See also: lookout, on

look out

To be watchful or careful; take care: If you don't look out, you could fall on the ice. The campers looked out for each other on the hike.
See also: look, out
References in periodicals archive ?
The airport will be the focal point of a unique First Nation-municipal enterprise partnership project that would see Sioux Lookout become a warehousing and distribution centre to deliver healthy and affordable food to remote communities.
The lookout towers are great spots to put the cameras because the towers were built on the highest peaks with the best visibility.
He said: "The old lookout was built in the early 1950s and was getting past its sell-by date, with water coming through the windows and lots of draughts.
he often donates his spare time to rebuilding his lookout in a "way that suits its historic nature.
If a PC accesses either of those websites, a "not found" error is displayed, Lookout said.
Aliens, City Defense and Baseball Superstars 2010, according to Lookout.
Android and iPhone marketplaces, Lookout found that fewer Android apps are able to access a person's contact list or retrieve location information compared with iPhone apps, while nearly twice as many iPhone apps can access contact data compared with Android.
The duties of a fire lookout were easy enough: "to learn every peak, ridge, hill, road, trail, lake, creek, building and false smoke" and spend at least 20 minutes every hour scanning the mountains for smoke.
TOP notch thriller starring Joseph Gordon-Levitt as a brain damaged janitor who agrees to act as a bank robbery lookout.
Eagles soar, snow-capped mountains beckon, and blue Pacific waters lie below: there's a reason a new townhouse development in Colwood, on Victoria's West Shore, is called The Lookout.
A LOOKOUT man on a ferry may not have seen a yacht in time to avert a crash because of the type of glasses he was wearing, an accident report said today.
The lookout had seen a dim white light and then a brighter red one.
A ferry lookout may not have seen a yacht in time to avert a collision because of the type of glasses he wore, an accident report said.
SANTA CLARITA -- The local sheriff's station received 157 fireworks complaints Tuesday night, but made just one arrest -- possibly because revelers were on the lookout for patrols.
While many larger scrap yards may be on the lookout for material that could be stolen, a number of scrap dealers imply that some smaller facilities, on the fringes of the scrap industry, see the purchase of stolen scrap as an opportunity to get the material at bargain prices.