名詞 frontal:

1. an adornment worn on the forehead
   同義詞：frontlet
2. a drapery that covers the front of an altar
3. the face or front of a building
   同義詞：facade, frontage

形容詞 frontal:

1. belonging to the front part
2. of or relating to the front of an advancing mass of air
3. meeting front to front
   同義詞：head-on
4. of or adjacent to the forehead or frontal bone

1. Situated anterior to the frontal bone.
   前額骨的位于額骨前部的
2. After days of inactivity, the enemy finally showed its teeth by a frontal attack on our position.
   幾天沒動靜之后，敵人終于齜牙咧嘴地向我們的陣地發(fā)動了正面的進(jìn)攻。
3. Facing forward; frontal.
   向前的; 正面的

frontal

adj.（形容詞）
Of, relating to, directed toward, or situated at the front:
前部的：前面的、與前面有關(guān)的、指向前方的或位于前方的：
例句：
a frontal attack.
來自前方的進(jìn)攻

Anatomy
【解剖學(xué)】
Of or relating to the forehead or frontal bone.
前額：與前額或額骨有關(guān)的或額骨的
Of or relating to the frontal plane.
正面的：正面圖的或與正面圖有關(guān)的
Of or relating to a meteorological front.
氣象鋒面的或與鋒面有關(guān)的

【引伸】
fron.tally
adv.（副詞）

---------------另--------------
frontal
frontal 2

n.（名詞）
A drapery covering the front of an altar.
遮擋祭壇前的帷幕
The faôade of a building.
建筑物的正面

來源：
Middle English frontel
中古英語 frontel
from Old French
源自 古法語
from Medieval Latin front3le
源自 中世紀(jì)拉丁語 front3le
from Latin frôns front- [forehead, front]
源自 拉丁語 frôns front- [前額，前面]