1. 大概;很可能;也許;據推測 If you say that something is presumably the case, you mean that you think it is very likely to be the case, although you are not certain.
e.g. Presumably the front door was locked when you came down this morning?... 早上你下樓的時(shí)候,前門(mén)大概是鎖上的吧? e.g. The spear is presumably the murder weapon... 這支魚(yú)叉可能就是兇器。