make a mountain out of a molehill

mountain | American Dictionary

mountain
noun[ C ]
us/ˈmɑʊn·tən/

mountainnoun[C] (HIGH PLACE)

a raised part of the earth’s surface, larger than a hill:
the Blue Ridge Mountains
We’re spending the weekend in the mountains (= an area with mountains).
The Rockies form the biggest North American mountain range (= group of mountains).

mountainnoun[C] (LARGE AMOUNT)

a large amount of something:
I’ve got mountains of work to do.
You’ll never eat that mountain of food.

mountain | Business English

mountain
noun[ C ]
uk /ˈmaʊntɪn/us
a large amount of food that is stored instead of being sold, in order to keep prices at high levels:
a butter/beef/grain mountain

Examples of mountain

mountain
They perceive mountains where there are no mountains, but frequently a great peak appears no larger than a rat-trap.
Treatises on landscape painting desiderated scenic encyclopaedias of pastoral, urban, mountains and far sea.
I think it is perhaps also to do with my love of remote places, my love of mountains rather than cities.
He would go off into the mountains for days on end.
Most campesinos live between two thousand and four thousand metres up in the mountains, in the harshest land, and still they are exploited.
Caves, valleys, mountains, rivers- all were invested with a profound reverential significance.
The mountains and lakes were now revered as a source of" uplift".
Sharp ridges, or arêtes, were formed between the corries and some of the mountains have pyramidal peaks.
Ritual places in hills, mountains and high places were always created fundamentally as cosmic projections.
As such, we recognize objects 'as' trees or mountains or tombs.
By stacking the dwellings, he sees the tower as making the most of the vistas to the mountains and creating an increased respect of nature.
Burial places, river-crossings, or mountains are not neutral places.
The first is well-defined and concrete, the mountains and rivers natural markers that stress territorial integrity and individuality.
The mountains rise steeply from the eastern coast and the majority of the population and associated development are located on the western coastal plain.
The persecution of minorities and opposition groups since early 1945 had forced thousands to take to the mountains or seek refuge across the frontier.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.