Definitions
1.AdjectiveAccompanying; conjoining; attending; concurrent. .mw-parser-output .defdate{font-size:smaller}
2.AdjectiveOf or relating to the grammatical aspect which expresses that a secondary action is occurring simultaneously to the primary action of the statement.
3.NounSomething happening or existing at the same time.
4.NounAn invariant homogeneous polynomial in the coefficients of a form, a covariant variable, and a contravariant variable.