This is the 15059th most frequent Turkish word.
set
A barrier, block, or a series; also used for collections or arrangements.
Here, 'set' is used to mean a barrier or obstruction placed somewhere.
Sahile set çekilmişti.
A barrier was placed on the shoreline.
In this context, 'set' refers to the partition or subdivision of a tennis match.
Teniste yeni bir set oynandı.
A new set was played in tennis.
Again, 'set' is used to denote a defense mechanism or construction against natural elements.