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The Collaborative International Dictionary of English v.0.48 (gcide)

ground \ground\ (ground), v. t. [imp. & p. p. {grounded}; p. pr.
& vb. n. {grounding}.]
1. To lay, set, or run, on the ground.
[1913 Webster]

2. To found; to fix or set, as on a foundation, reason, or
principle; to furnish a ground for; to fix firmly.
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Being rooted and grounded in love. --Eph. iii.
17.
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So far from warranting any inference to the
existence of a God, would, on the contrary, ground
even an argument to his negation. --Sir W.
Hamilton
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3. To instruct in elements or first principles.
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4. (Elec.) To connect with the ground so as to make the earth
a part of an electrical circuit.
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5. (Fine Arts) To cover with a ground, as a copper plate for
etching (see {Ground}, n., 5); or as paper or other
materials with a uniform tint as a preparation for
ornament.
[1913 Webster]

6. To forbid (a pilot) to fly an airplane; -- usually as a
disciplinary measure, or for reasons of ill health
sufficient to interfere with performance.
[PJC]

7. To forbid (aircraft) to fly; -- usually due to the unsafe
condition of the aircraft or lack of conformity to safety
regulations; as, the discovery of a crack in the wing of a
Trijet caused the whole fleeet to be grounded for
inspection.
[PJC]

8. To temporarily restrict the activities of (a child),
especially social activity outside the house; -- usually
for bad or unsatisfactory conduct; as, Johnny was grounded
for fighting at school and can't go to the movies for two
weeks.
[PJC]