What is the meaning of þæt?

nominative/accusative neuter singular of : the

nominative/accusative neuter singular of : that

nominative/accusative neuter singular of : that, that one

they, that, those (regardless of gender and number; compare Old Norse þat, Dutch dat)

that

so (so that)

without (followed by a negative phrase)

it

that

Source: wiktionary.org