Definition of rationalise
                                                                                                    
                                                                    
                                                                                                                 defend, explain, 
clear away, or 
make excuses for by reasoning; "rationalize the child's 
seemingly crazy behavior"; "he rationalized his 
lack of success"
                                                                        
 
                                                                    
                                                                                                                 think rationally; 
employ logic or reason; "When one wonders why one is doing 
certain things, one should rationalize"