Definition of hijack for English Language Learners. : 1  to stop and steal (a moving vehicle) : 2  to steal (something) from a moving vehicle that you have stopped. : 3  to take control of (an aircraft) by force.
Dictionary entry overview: What does reconstitute mean? â¢ RECONSTITUTE (verb) The verb RECONSTITUTE has 1 sense: 1. construct or form anew or provide with a new structure Familiarity information: RECONSTITUTE used as a verb is very rare.
Definition of 'astute'. astute (ÉstjuËt , US ÉstuËt ) If you describe someone as astute, you think they show an understanding of behaviour and situations, and are skilful at using this knowledge to their own advantage. She was politically astute. He made a series of astute business decisions.