Etymology of the Tunisian Arabic word sīrru سيرّو (Spanish cierro?)

[djara]

In Tunisian Arabic, the word sīrru سيرّو means fence.
A possible etymology is the Spanish word cierro, defined in El Diccionario de la lengua española as:
"1. m. Acción y efecto de cerrar.
2. m. And. mirador (‖ balcón cerrado).
3. m. Chile. Cerca, tapia o vallado"
The Tunisian usage corresponds to the Chilean usage (least likely source) and doesn't correspond to the Andalusian source (most likely source).
Is there a historical explanation for this? Was the word cierro ever used to mean fence in Spain, even regionally?

Edit: added (Spanish cierro?) to the title

 

[Circunflejo]

From a meaning point of view, cierre more likely than cierro. From a phonetic point of view, cierro more likely than cierre due to the /u/ ending of the Tunisian Arabic word.

 

[Cenzontle]

In the online historical Corpus del Español I find two instances of "el cierro" in the correspondence of the 18th-century Spanish author Gaspar Melchor de Jovellanos, where it seems to mean more like "fenced area" rather than the fence itself.
The date is a little late for exchanges with Arabic.