The Collaborative International Dictionary of English v.0.48:
Hard \Hard\, adv. [OE. harde, AS. hearde.]
1. With pressure; with urgency; hence, diligently; earnestly.
And prayed so hard for mercy from the prince.
Is hard at study; pray now, rest yourself. --Shak.
2. With difficulty; as, the vehicle moves hard.
3. Uneasily; vexatiously; slowly. --Shak.
4. So as to raise difficulties. "The question is hard set."
--Sir T. Browne.
5. With tension or strain of the powers; violently; with
force; tempestuously; vehemently; vigorously;
energetically; as, to press, to blow, to rain hard; hence,
rapidly; nimbly; as, to run hard.
6. Close or near.
Whose house joined hard to the synagogue. --Acts
Hard by, near by; close at hand; not far off. "Hard by a
cottage chimney smokes." --Milton.
Hard pushed, Hard run, greatly pressed; as, he was hard
pushed or hard run for time, money, etc. [Colloq.]
Hard up, closely pressed by want or necessity; without
money or resources; as, hard up for amusements. [Slang]
Note: Hard in nautical language is often joined to words of
command to the helmsman, denoting that the order should
be carried out with the utmost energy, or that the helm
should be put, in the direction indicated, to the
extreme limit, as, Hard aport! Hard astarboard! Hard
alee! Hard aweather! Hard up!
Hard is also often used in composition with a
participle; as, hard-baked; hard-earned; hard-featured;