علو doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has 6 entries for it, distinguished by diacritics. Select one below for the full classical Arabic definition.

• عَلَا Form 1

  1 عَلَا ذ , (Msb, K,) aor. يَعْلُو, (Msb,) inf. n. عُلُوٌّ; (Msb, K;) and عَلِىَ; and [which last see also below]; (K;) It (a thing, Msb) was, or became, high, elevated, or lofty; (Msb, K; *) syn. اِرْتَفَعَ; (Msb;) and …

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• عَلْوٌ

  عَلْوٌ ذ : see عُلْوٌ in five places. -b2- Also A high, or an elevated, state of the base, or foundation, of a building. (TA.) -b3- And you say, أَخَذَهُ عَلْوًا, meaning (assumed tropical:) He took him, or it, by force.…

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• عُلْوٌ

  عُلْوٌ ذ and (S, Msb, K) and (K) signify The higher, or highest, part (S, Msb, K) of a house, or an abode, (S, Msb,) or of a thing; (K;) as also (K voce سُفْلٌ) and and . (K in the present art.) You say, قَعَدْتُ عُلْوَه…

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• عِلْوٌ

  عِلْوٌ ذ : see the next preceding paragraph, in three places.…

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• عَلُوٌّ

  عَلُوٌّ ذ , like عَدُوٌّ [in measure], an epithet used in the phrase رَجُلٌ عَلُوٌّ لِلرِّجَالِ [app. meaning A man wont to exalt himself to other men]. (TA.)…

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• عُلُوٌّ

  عُلُوٌّ ذ : [see 1, of which it is an inf. n., and] see عِلِىٌّ.…

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