definías
-you were defining
The word definías is the imperfect form of definir in the second person singular. There are other translations for this conjugation.
See the full definir conjugation

definir

Está bien, me dije, como te definías como un tipo ocurrente seguro que encuentras una alternativa a la altura de tu inmenso talento (esbocé una sonrisa escéptica; por lo del talento).
All right, I told myself, as you defined yourself as a witty guy you certainly will find an alternative equal to your immense talent (I sketched a sceptic smile; about the talent).
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