nullable

About 0.03 uses per million words.

Meaning

1. adjective That may be nullified; nullifiable.
2. adjective That is allowed to have a null value.
3. noun A variable, etc. that is allowed to have a null value.

Similar words

unnullified nullified unannullable nonvoidable nillable indefeasible unmollifiable unvoidable null and void indeclarable

Often followed by

types type columns value column data and or fields