(n) reason
pretext
motive
(P)
(n) (comp) reason for revision
reason for modification
(n) grounds for an appeal
(n) reason for being
raison d'etre
(n) invitation letter (e.g. document in support of a visa to enter Japan)
(n) principle of reason (logic)
(n) invitation letter (e.g. document in support of a visa to enter Japan)
(n) ostensible (surface) reason
(exp,v1) to give a reason
(exp) to ask the reason
(exp,v1) to give a reason
(exp) the reason(s) is (are) as follows
(n) principle of sufficient reason (logic)
(exp) for whatever reason
(exp) for various reasons