/graʊnd ||; graυnd/noun1 the ground [sing] the solid surface of the earth 地面: We sat on the ground to eat our picnic. 我们席地而坐吃野餐。He slipped off the ladder and fell to the ground. 她从梯子上滑下来，掉到地上。waste ground(= that is not being used) 荒地
2 [U] an area or type of soil 土地；土壤: solid/marshy/stony ground 硬地；沼泽地；石头地
The Earth is the name of the planet where we live. Land is the opposite of sea The sailors sighted land. The astronauts returned to Earth. Land is also something that you can buy or sell The price of land in Tokyo is extremely high.When you are outside, the surface under your feet is called the ground. When you are inside it is called the floor Don't sit on the ground. You'll get wet. Don't sit on the floor. I'll get another chair.Plants grow in earth or soil. 我们居住的星球叫地球(the Earth)。陆地(land)相对于海洋而言：The sailors sighted land. 水手看见陆地。·The astronauts returned to Earth. 宇航员返回地球。land 也指可供买卖的土地：The price of land in Tokyo is extremely high. 东京的地价非常高。室外的地面叫 the ground。室内的地面叫 the floor： Don't sit on the ground. You'll get wet. 别坐在地板上，你会把自己弄湿的。·Don't sit on the floor. I'll get another chair. 别坐在地上，我再弄一把椅子来吧。植物生长在土壤(earth或soil)里。 3 [C] a piece of land that is used for a particular purpose （作特定用途的）场地: a sports ground 运动场a playground 游乐场
4 grounds [pl] land or gardens surrounding a large building （建筑物周围的）土地，庭园: the grounds of the palace 皇宫的庭园
5 [U] an area of interest, study, discussion, etc （兴趣、学习、讨论等的）范围，领域: The lecture went over the same old ground /covered a lot of new ground. 那堂课讲的是旧东西／讲了很多新东西。to be on dangerous ground(= saying sth likely to cause anger) 处于危险的境地
6 [C] [usu.pl] grounds (for sth/doing sth) a reason for sth 原因；理由: She retired on medical grounds. 她因病退休。grounds for divorce 离婚理由
7 (US 美) =EARTH¹(4)
above/below ground above/below the surface of the earth 地面之上╱下
break fresh/new ground to make a discovery or introduce a new method or activity 开辟新天地；发现新方法
gain ground→
GAIN¹
get off the ground (used about a business, project, etc) to make a successful start （指企业、工程等）顺利开始
give/lose ground (to sb/sth) to allow sb to have an advantage; to lose an advantage for yourself 让步；退却；失去地盘:
Labour lost a lot of ground to the Liberal Democrats at the election. 工党在选举中将好多地盘丢给了自由民主党。 hold/keep/stand your ground to refuse to change your opinion or to be influenced by pressure from other people 坚持立场；不肯让步
thin on the ground difficult to find; not common 很难找到；不大常见