0 a list of people or things that must be watched closely, for example because they might be dangerous or in danger, or because you want to see what happens to them:
1 a list of companies, investments, etc. whose activity is being closely followed, for example because there may be problems in the future:
2 a list of companies, people, etc. whose activity is being closely examined to check that they are not doing something illegal:
Terrorist watch lists are used to screen people flying into the country from abroad.
Once fingerprints and digital photos are in the system, US agents can confirm travellers' identities and check them against watch lists.
Our stock watch list provides numerous investment ideas each week.