transitive verb
Definition 1
Bind (person, oneself) by oath, promise, contract, etc. to person or to do.
Source: Concise Oxford Dictionary
Context: This document obliges the parties to enter into a full lease document as named in the Agreement to Lease.
Source: www.downiestewart.co.nz
Definition 2
Constrain, compel (to do or not to do).
Source: Invertext, from Concise Oxford Dictionary
Context: Therefore, the break signal 8 obliges the CPU 11 to stop at an undesired address.
Source: .freepatentsonline.com (H. Harigai)