what does overlap mean
overlap oÂ·verÂ·lap (Å'vÉr-lÄp') n. A part or portion of a structure that extends or projects over another. The suturing of one layer of tissue above or under another layer to provide additional strength, often used in dental surgery. v. oÂ·verÂ·lapped, oÂ·verÂ·lapÂ·ping, oÂ·verÂ·laps (Å'vÉr-lÄp') To lie over and partly cover something.