غلبته doesn't appear in Hans Wehr's Modern Standard Arabic dictionary, but Lane's Arabic-English Lexicon has an entry for it. Select the entry below for the full classical Arabic definition.

• غَلَّبْتُهُ Form 2

  2 غَلَّبْتُهُ عَلَيْهِ ذ , inf. n. تَغْلِيبٌ, [I made him to overcome, conquer, subdue, overpower, master, or surpass, him, or it; &c.: see 1: and] I made him to gain the mastery over it, or to obtain possession of it, (…

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