Dir sirs,<br/><br/>I'd like to ask native speakers of English about the usage of the word "expensive".<br/><br/>The "LONGMAN" dictionary specifically notes, "Don't use 'expensive' with the word rent like "the rent is expensive".<br/><br/>It and any other dictionary I have consulted use "high" instead of expensive for "rent". <br/><br/>However, the COLLINS COBUILD cites the following sentence:<br/><br/>" They actually moved down from upstairs because the rent's that expensive."<br/><br/>Does it mean that the sentence "The rent is expensive" is grammatically wrong, but used in everyday life?<br/><br/><br/><br/>Thank you in advance.<br/><br/>