1.
Something that is ~ is very unpleasant or shocking.
He described it as the most ~ experience of his life...
= horrific
ADJ
2.
Some people use ~ to describe something that is so big or great that they find it extremely unpleasant. (INFORMAL)
...the usually ~ traffic jams.
= dreadful
ADJ
~ly
Many outings can now be ~ly expensive for parents with a young family.
ADV: usu ADV adj/-ed, also ADV after v