To go with or attend as a companion or associate; to keep company with; to go along with.
To perform an accompanying part next to (another instrument or musician).
To perform an accompanying part or parts in a composition.
To supplement with; add to.
To be found at the same time.
To establish a baseline of mutual understanding
An event consisting of level setting
The set of values x for which a real-valued function f(x) is equal to a given constant.
A state of mutual understanding among parties