mast
n. countable B2 Upper Intermediate US //ˈmæst// UK //mˈɑːst// mast
n. a tall, vertical pole on a ship or boat that holds up the sails. It can also mean a tall tower used to send out radio or phone signals.
n. a vertical spar or pole used to support sails and rigging on a vessel, or a tall upright structure used as an antenna for telecommunications.
The ship's main mast broke during the heavy storm.
The local community protested against the installation of a new mobile phone mast on the hill.
As the schooner rounded the cape, the crew scrambled to secure the rigging against the central mast to prevent the gale from snapping the timber.
Usage
Commonly modified by 'main', 'fore', or 'radio' to specify the structure's purpose.