1. to cause something to explode or bring it to an end
blow up the building; blow apart hopes/theory/plans
To 'blow up' means to explode or to lose one's temper. "He blew up at her when he realised what she had done." It can also be used to talk about a storm or the weather. "A sandstorm blew up after dinner." A scandal or incident which has emerged or become public can be said to 'blow up'. "The case blew up this week due to new evidence." To 'blow up' something can also mean to inflate it, you can 'blow up' a balloon or an air mattress for example or an inflatable toy. As a noun, 'a blow-up' can refer to the resizing of an image "I'd like a blow-up of that photo to hang on my wall." It can also be an outburst of anger. "The blow-up she had at her mother was very uncharacteristic." As an adjective something 'blow-up' is able to be inflated such as 'a blow-up mattress' or a 'blow-up flotation device'. To 'blow something apart' can mean to destroy it with an explosion. "The dynamite blew apart the rock blocking access to the cave." To 'blow apart something' can also mean to prove it is wrong or false. "The research has blown apart the assumption that women could not play music as well as men."