What did Old English use Ꝥ for?

Here are some examples of citations in the OED of Old English where they use a standalone crossed thorn, Ꝥ:

• Þu aclænsast Ꝥ weofod and ʒehalʒast.
• Þær after com swulke mon-qualm Ꝥ lute hær cwike læfden.
• Heo unwreih þene put Ꝥ hit adronc inne.
• Đer··Ꝥ fyr ne bið ʒidrysnad.
• Þa sæde he [Epicurus] Ꝥ se lust wære Ꝥ hehste good.
• Þu steorest te sea stream Ꝥ hit fleden ne mot fir þan þu markedest.
• Eft is heofena rice ʒelic þam mangere þe sohte Ꝥ gode mere-grot.
• Al swa þat wilde swin Ꝥ wroteð ȝeond þan grouen.
• Swa hwa swa wille sawan westmabære land, atio ærest of ða þornas & þa fyrsas & Ꝥ fearn & ealle þa weod.

That’s the Unicode glyph of a thorn with a stroke:

‭ Þ  00DE       LATIN CAPITAL LETTER THORN
‭ þ  00FE       LATIN SMALL LETTER THORN
        * Icelandic, Old English, phonetics
        * Runic letter borrowed into Latin script
        x (runic letter thurisaz thurs thorn - 16A6)
‭ ᚦ  16A6       RUNIC LETTER THURISAZ THURS THORN
        x (latin small letter thorn - 00FE)
‭ Ꝥ  A764       LATIN CAPITAL LETTER THORN WITH STROKE
‭ ꝥ  A765       LATIN SMALL LETTER THORN WITH STROKE
‭ Ꝧ  A766       LATIN CAPITAL LETTER THORN WITH STROKE THROUGH DESCENDER
‭ ꝧ  A767       LATIN SMALL LETTER THORN WITH STROKE THROUGH DESCENDER

It may be that it is supposed to be a small thorn with stroke not a capital one. I need a better magnifying glass. :)

If you can't see it in your browser, it looks like this:

But my question is: what does it mean?

What does that mean? Is it a scribal abbreviation for the or that, or both or neither?

In the Old English language that was spelled þæt. It was also abbreviated as a letter Thorn, þ, with the ascender crossed, ꝥ .

Wikipedia: That

According to the website http://bible-researcher.com/engchange.html, it was an abbreviation for that (I.e. thorn, ash, t - I can't get runes to work on my phone).

A crossed thorn stood for þæt, which was the neuter singular definite article. Þe was a relative pronoun in OE, and there was little point in abbreviating it as the only alternative is either þ. or þ+ a superscript e, neither of which saves a lot of time in writing.

The words for "the" in OE were se ... seo ... þæt etc. e.g., "...þa com þær regen and bleowon windas and risan flod and hruron on þæt hus, and hit na ne feoll. Soþlice hit wæs ofer stan ge.timbrode." where "þæt hus" should be translated as "the house", and could be indicated as a crossed thorn plus hus.