The meaning of ASSIDUOUS is showing great care, attention, and effort : marked by careful unremitting attention or persistent application. How to use assiduous in a sentence.

ASSIDUOUS definition: constant in application or effort; working diligently at a task; persevering; industrious; meticulous. See examples of assiduous used in a sentence.

Measured against his work-shy ways, she is assiduous and industrious; against his seeming juvenility; she is mature and dependable; against his profligate drinking, she is sober and stable.

Definition of assiduous adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Someone who is assiduous works hard or does things very thoroughly. ...an assiduous student.

Jan 17, 2026 · Adjective assiduous (comparative more assiduous, superlative most assiduous) Hard-working, diligent or regular (in attendance or work); industrious. Synonyms: meticulous, diligent, …

Showing or characterized by persistent attention or untiring application: an assiduous worker who strove for perfection; did assiduous research before writing the book.

assiduous meaning, definition, what is assiduous: very careful to make sure that something...: Learn more.

Assiduous definition: Showing or characterized by persistent attention or untiring application.

The project required some assiduous planning. He worked assiduously [= diligently] to improve his grades.