Množina: assertions

A constraint that is specified by a CREATE ASSERTION statement (rather than by a clause of a CREATE TABLE statement). Assertions commonly apply to more than one table.
A Boolean statement used in a program to test a condition that, if the program is operating correctly, should always evaluate as true; otherwise the program will typically terminate with an appropriate error message. Assertions are used for debugging programs and for documenting how a program should operate.

Množina: assertions

ETYM Latin assertio, from asserere.
A declaration that is made as if no supporting evidence were necessary; SYN. averment, asseveration.

assertion sign

Množina: assertion without substances

Singular of assertions is assertion.