Found 2 items, similar to imperceptibly.
English → English (WordNet) Definition: imperceptibly imperceptibly adv : in an imperceptible manner or to an imperceptible degree; “the power of the Secretary of State in London increased gradually but imperceptibly” [syn: unnoticeably, observably] [ant: perceptibly]
English → English (gcide) Definition: Imperceptibly Imperceptible \Im`per*cep"ti*ble\, a. [Pref. im- not + perceptible: cf. F. imperceptible.] Not perceptible; not to be apprehended or cognized by the senses; not discernible by the mind; not easily apprehended. [1913 Webster] Almost imperceptible to the touch. --Dryden. [1913 Webster] Its operation is slow, and in some cases almost imperceptible. --Burke. -- Im`per*cep"ti*ble*ness, n. -- Im`per*cep"ti*bly, adv. [1913 Webster] Their . . . subtilty and imperceptibleness. --Sir M. Hale. [1913 Webster]