Scrum-of-Scrums (SoS)

In a multi-scrum-team environment: a meeting held after all the individual Scrum Teams’ Daily Scrums, consisting of a representative/ambassador from each Scrum Team, in order to achieve cross-team collaboration;
A virtual Scrum Team composed of the Scrum Masters from each Scrum Team; and
Any virtual Scrum Team composed of representatives from various Scrum Teams.