Pilfer \Pil"fer\, v. i. [imp. & p. p. {Pilfered}; p. pr. & vb. n. {Pilfering}.] [OF. pelfrer. See {Pelf}.] To steal in small quantities, or articles of small value; to practice petty theft. Pilfering \Pil"fer*ing\, a. Thieving in a small way. --Shak. -- n. Petty theft. -- {Pil"fer*ing*ly}, adv.