definition of
ensure

[1] #1 ensure v. [guarantee, insure, assure, secure] make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!". wn

[2] #2 ensure v. [see, check, insure, see to it, control, ascertain, assure] be careful or certain to do something; make certain of something; "He verified that the valves were closed"; "See that the curtains are closed"; "control the quality of the product". wn