informatory

WordReference Random House Learner's Dictionary of American English © 2026

in•form•a•tive /ɪnˈfɔrmətɪv/   adj. 

1. giving information;
   instructive:
   an informative book.

in•form•a•tive•ly, adv. 
in•form•a•tive•ness, n. [uncountable] See -form-.

WordReference Random House Unabridged Dictionary of American English © 2026

in•form•a•tive  (in fôr′mə tiv), adj. 

1. giving information; instructive:
   an informative book.

Also, in•form•a•to•ry  (in fôr′mə tôr′ē, -tōr′ē). 

• Medieval Latin infōrmātīvus, equivalent. to Latin infōrmāt(us) (past participle of infōrmāre to inform¹) + -īvus -ive
• late Middle English: formative 1375–1425

in•form′a•tive•ly, adv. 
in•form′a•tive•ness, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

informative / ɪnˈfɔːmətɪv/, informatory adjective

1. providing information; instructive

inˈformatively adverb

inˈformativeness noun