Finally got to the answer. Had to set user agent when screen scraping. My resulting code for getting definitions via scraping:
var request = require('request')
, cheerio = require('cheerio');
var searchTerm = 'test';
request({url:'https://www.google.co.uk/search?q=define+'+searchTerm,headers:{"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0"}}, function(err, resp, body){
$ = cheerio.load(body);
var defineBlocks = $(".lr_dct_sf_sen");
var numOfBlocks = (defineBlocks.length < 3) ? defineBlocks.length : 3;
for (var i=0; i<numOfBlocks; i++){
var block = defineBlocks[i].children[1].children[0]; //font-size:small level
process(block);
function process (block) {
for (var i=0; i<block.children.length; i++){
var line = block.children[i];
if ("style" in line.attribs){ // main text
exampleStr = "";
for (var k=0; k<line.children.length; k++){
exampleStr += line.children[k].children[0].data;
}
console.log(exampleStr);
} else if ("class" in line.attribs){ // example
console.log("\""+line.children[1].children[0].data+"\"");
} else { // nothing i want
}
}
}
}
});