n.
Function: transitive verb
Date: 13th century
1 a : to bring to or place on the ground b : to cause to run aground
2 a : to provide a reason or justification for <our fears about technological change may be well ground ed ― L. K. Williams> b : to furnish with a foundation of knowledge : BASE <an understanding ⋯ that is ground ed in fact ― Michael Kimmelman>
3 : to connect electrically with a ground
4 a : to restrict to the ground < ground a pilot> b : to prohibit from taking part in some usual activities < ground ed her for a week>
5 : to throw (a football) intentionally to the ground to avoid being tackled for a loss
intransitive verb
1 : to have a ground or basis : RELY
2 : to run aground
3 : to hit a grounder < ground ed back to the pitcher>