keep a lookout

USAGE SUMMARY

"keep a lookout" is correct and usable in written English.
You can use this phrase when you want to caution someone to be alert and vigilant for potential danger or changes in the environment. For example, "Keep a lookout for sudden weather changes while you are sailing."

✓ Grammatically correct

News & Media

Wiki

Travel

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

NOAA has also called on a growing cadre of beachcombers to keep a lookout.

The New York Times

Beady boatmen keep a lookout for winter trade from the nearby bars.

The Guardian - Film

protect themselves from attacks . . . and keep a lookout in the tower".

The New Yorker

… But then, so, we have to keep a lookout for that.

The Washington Post

The important thing is to keep a lookout for any sight of moon or star or horizon line.

The New Yorker

"It is incumbent on both of them to keep a lookout under visual flight rules," Mr. Black said.

The New York Times

A robot equipped with Vision Command can even keep a lookout and record the actions of intruders.

The New York Times - Tech

Keep a lookout for it as you pass through the woods at the start of this walk.

The Guardian - Travel

Keep a lookout for eagles, three-wattled bellbirds and tiny blue frogs, screeching howler monkeys and tropical birds overhead.

The New York Times - Travel

Human-verified similar examples from authoritative sources

Similar Expressions

2 human-written examples

Keep a lookout because they've got more funding coming in October.

Huffington Post

Things that you have in the back of your mind to keep a lookout for – so finally, everyone's talking about the same picture.

The Guardian - Film

Expert writing Tips

Best practice

When using "keep a lookout", clearly specify what the subject should be watching for to avoid ambiguity. For example, "Keep a lookout for any signs of damage" is more effective than simply "Keep a lookout."

Common error

While "keep a lookout" is acceptable, it can sound informal. In professional or academic contexts, consider using phrases like "maintain vigilance" or "remain observant" for a more sophisticated tone.

Linguistic Context

The phrase "keep a lookout" primarily functions as an imperative verb phrase. It is used to instruct or advise someone to be vigilant and observant. Ludwig AI confirms this usage, providing numerous examples where the phrase serves as a directive.

Expression frequency: Very common

Frequent in

News & Media

35%

Wiki

15%

Travel

10%

Less common in

Formal & Business

8%

Science

7%

Encyclopedias

0%

Ludwig's WRAP-UP

"Keep a lookout" is a common and generally correct phrase used to advise vigilance. As Ludwig AI confirms, it functions as an imperative verb phrase, instructing someone to be observant. While widely used in news, media, and general contexts, its informal tone might not be suitable for academic or highly professional settings. Consider alternatives like "maintain vigilance" for more formal contexts. Effective use involves clearly specifying what the subject should be watching for.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

keep watch

Stresses the act of continuously observing for something specific.

stay watchful

Focuses on a persistent state of being ready to notice anything important or dangerous.

stay alert

Focuses on maintaining a state of attentiveness to the surroundings.

maintain vigilance

Suggests a sustained effort to remain watchful and prepared.

be vigilant

Emphasizes a state of heightened alertness and readiness for potential danger or opportunity.

be on guard

Highlights the act of protecting oneself or others from potential threats.

watch out

A more direct and immediate warning to be careful.

be observant

Highlights the importance of paying close attention to details.

be aware

Indicates a general understanding and attentiveness to one's surroundings.

monitor the situation

Implies a more systematic and ongoing assessment of circumstances.

FAQs

How can I use "keep a lookout" in a sentence?

You can use "keep a lookout" to advise someone to be watchful. For example, "Keep a lookout for any changes in the patient's condition."

What are some alternatives to "keep a lookout"?

Alternatives include "stay alert", "be vigilant", or "keep watch". The best choice depends on the specific context and desired level of formality.

Is "keep a lookout" formal or informal?

"Keep a lookout" is generally considered informal. For formal settings, consider using alternatives like "maintain vigilance" or "exercise caution".

What does "keep a lookout" mean?

"Keep a lookout" means to remain alert and watchful, typically for potential danger or something specific that needs to be observed.