Alli is one of the few over-the-counter diet aids that might actually work, according to the Mayo Clinic. The pill is a lower-dosage version of Xenical, consisting of 60 mg of the fat-blocking drug orlistat.
Adjective[edit] tentative â(comparative more tentative, superlative most tentative) Of or pertaining to a trial or trials; essaying; experimental.
Definition of vague for English Language Learners. : 1  not clear in meaning : stated in a way that is general and not specific. : 2  not thinking or expressing your thoughts clearly or precisely. : 3  not completely formed or developed.