Sentence:  Furthermore, the first <WSD>attestations</WSD> given in the "OED" are not always the earliest <WSD>attestations</WSD> in print; since the first edition was finished in 1928, many earlier and later examples have been identified, and these will be incorporated into the third edition, currently underway (see Durkin 2002 for a discussion of how much this is likely to change the dates of <WSD>attestation</WSD> in the "OED" as a whole). 
Meaning of the word marked with <WSD> tags:  An appearance in print or otherwise recorded on a permanent medium.