[1] The headword -- similarly glossed in other lexica; evidently quoted from somewhere, is neuter singular of this adjective. cf. under alpha 3095.
[2] Iamblichus, Babyloniaca fr.43 Habrich.
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NB this is Adler's epsilon 3549a. Here, faute de mieux, is 3549b:
Εὐκτήμονος: πλουσίου
Of a wealthy man: [meaning] of a rich one.
The headword -- here in the genitive case and so evidently quoted from somewhere -- is best attested as a proper name, Euktemon, but for the adjectival sense see e.g. Pindar, Nemeans 7.92.