okreleniem
Okreleniem is the instrumental form of the Polish noun określenie, which roughly means definition, specification, or designation. In standard Polish the word is written with the diacritic as określeniem. The form without diacritics, okreleniem, is generally regarded as a misspelling or nonstandard variant and may appear in texts where diacritics are omitted.
The base noun określenie refers to the act or result of defining something, or to the content
Etymology of the word traces to the verb określić, meaning to define or specify, with the nominalizing
In usage, one typically encounters określenie or definicja to express the notion of a definition or specification.