preposition A word that shows the relationship between a noun (or pronoun) and other words in a sentence. In this case, 'on' indicates the position or location of being 'the lookout for'.
Parents are on the lookout for any signs of illness in their children.
Park rangers are on the lookout for poachers in protected areas.
Police officers are on the lookout for any signs of criminal behavior.
Reporters are on the lookout for breaking news stories.
Store employees are on the lookout for shoplifters.
Security guards are always on the lookout for suspicious activity.
As a writer, I am always on the lookout for new story ideas and inspiration.
Psychologists are constantly on the lookout for signs of mental health issues in their patients.
In my role as a marketing manager, I am always on the lookout for new trends and opportunities in the market.
As a software developer, I am constantly on the lookout for bugs and errors in the code.
Financial analysts are always on the lookout for potential investment opportunities and market trends.
Human resources managers are on the lookout for talented individuals to fill job vacancies within the company.
Sales representatives are always on the lookout for new leads and potential customers.
Teachers are constantly on the lookout for ways to engage and motivate their students in the classroom.
Chefs are always on the lookout for fresh, high-quality ingredients to use in their dishes.
Doctors are on the lookout for symptoms and signs of illness in their patients during consultations.