ge-brǽdan
This might be just a supplemental entry adding to an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
ge-brǽdan
Add:I. to spread out Genim þá leáf, gebrǽd on gærse, Lch. ii. 124, 20. II. to extend, enlarge Hé gebrǽdde his ríce oþ India gemǽro ad Indium extendit imperium, Ors. 5, 2 ; S. 218, 25. Hié ne mót heore mearce gebrǽdan ofer þá eorþan. Bt. 21; F. 74, 28. Mid ðǽm bióð synna swíðe gebrǽdda, Past. 30, 14. [O. H. Ger. ge-breiten dilatare.]
This is a supplementary entry with editorial changes to an entry in the main volume of the dictionary. Look under the 'Possibly connected entries' below, or for the same headword in the list to the left.

A Combined List of Abbreviations.

Abbreviation not recognized. See:

A Combined List of Abbreviations.