Concise Bible Dictionary:
The common weapon for discharging arrows. It is used symbolically for the hidden attacks of the wicked against the righteous (Psa. 11:2; Psa. 37:14-15). A “bow of steel” signifies great strength (Job 20:24). The wicked are like a “deceitful bow,” one that breaks when it is depended upon (Psa. 78:57; Hos. 7:16). In 2 Samuel 1:18 David’s elegy on Saul and Jonathan is called “The Bow.” The children were taught “[the song of] the Bow” (RV).
Strong’s Dictionary of Greek Words:
Meaning:
from the base of 5088; a bow (apparently as the simplest fabric)