adverb in a league or alliance with someone or something
preposition working together with someone or something in a secretive or conspiratorial way
Countries in league with each other may have defense agreements or alliances.
Political parties in league with each other may collaborate on certain policies or initiatives.
Companies in league may form partnerships or alliances to achieve common goals.
Gangs or criminal organizations in league with each other may collaborate on illegal activities.
Teams in league with each other compete regularly in organized competitions.
Artists or performers in league often work together on projects or tours.
The writer was in league with the publisher to promote the new book.
The psychologist suspected that the patient's family members were in league against them.
The sports agent was accused of being in league with the team owners to manipulate player contracts.
The lawyer discovered that the opposing counsel was in league with a key witness.
The politician denied being in league with the lobbyists despite evidence suggesting otherwise.