The state of two or more things existing together, usually in a temporal or spatial sense, with or without mutual interaction.
Something happening or existing at the same time.
An invariant homogeneous polynomial in the coefficients of a form, a covariant variable, and a contravariant variable.
Of or relating to the grammatical aspect which expresses that a secondary action is occurring simultaneously to the primary action of the statement.
Accompanying; conjoining; attending; concurrent.