ADJECTIVE (1)

1. stuck in a place where a ship can no longer float;
- Example: "a ship aground offshore"
- Example: "a boat aground on the beach waiting for the tide to lift it"


ADVERB (1)

1. with the bottom lodged on the ground;
- Example: "he ran the ship aground"

The Collaborative International Dictionary of English v.0.48:

Aground \A*ground"\, adv. & a. [Pref. a- + ground.]
   On the ground; stranded; -- a nautical term applied to a ship
   when its bottom lodges on the ground. --Totten.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aground
    adv 1: with the bottom lodged on the ground; "he ran the ship
           aground"
    adj 1: stuck in a place where a ship can no longer float; "a
           ship aground offshore"; "a boat aground on the beach
           waiting for the tide to lift it" [ant: afloat(p)]