Boyd’s Bible Dictionary:
(for gnawing). Large figurative use (Psa. 90:5-6; Isa. 40:6,8; James 1:10-11; 1 Peter 1:24); sometimes herbage in general (Isa. 15:6); a fuel (Matt. 6:30; Luke 12:28).
Concise Bible Dictionary:
A field in Israel (with anemone coronaria).
This word is often used in scripture for any kind of small herb or fodder. It is frequently referred to metaphorically to represent human frailty. “Surely the people is grass: the grass withereth, the flower fadeth” (Isa. 40:7-8). It is growing one day, and the next it is cast into the oven as fuel (Matt. 6:30).
Strong’s Dictionary of Greek Words:
Meaning:
apparently a primary word; a "court" or "garden", i.e. (by implication, of pasture) herbage or vegetation
KJV Usage:
blade, grass, hay