cut off (down), poll, shave, ((sheep-)) shear(-er)

Boyd’s Bible Dictionary:

(head). The head (Num. 3:47). To cut the hair (2 Sam. 14:26).

Concise Bible Dictionary:

The skull or head, but used to express a person (Num. 1:2-22; Num. 3:47; 1 Chron. 23:3,24).

Strong’s Dictionary of Hebrew Words:

Number:
1494 (find all occurrences in KJV Bible)
Transliteration:
gazaz
Phonic:
gaw-zaz’
Meaning:
a primitive root (akin to 1468); to cut off; specifically to shear a flock or shave the hair; figuratively to destroy an enemy
KJV Usage:
cut off (down), poll, shave, ((sheep-)) shear(-er)