0 a secret warning or piece of secret information:
1 a warning or information that something may happen:
Although useful and innovative in many respects, these theoretical interventions are incomplete, and the tip-off is their aura of omniscience.
Perhaps he had an anonymous tip-off, possibly from the security services, or he saw satellite photographs.
Does what he said about the possibility of a tip-off apply to the right of a person in detention to have his solicitor informed?
The police had gone to the store because they had a tip-off that some people employed there were illegal entrants.
That may be the kind of tip-off that one gets from a neighbour when they do not have a good relationship.
For example, it might reveal the source of a tip-off within a company under investigation.
I have in mind a case involving a major banknote forgery where suspects were arrested in a hotel bedroom following a tip-off.
The officer has a tip-off that there is known to be poaching in the district.