Deposing meaning : To put down; to lay down; to deposit; to lay aside; to put away. To remove (a leader) from (high) office, without killing the incumbent. To give evidence or testimony, especially in response to interrogation during a deposition To interrogate and elicit testimony from during a deposition; typically done by a lawyer. To take or swear an oath. To testify; to bear witness; to claim; to assert; to affirm.