envelope

• ⇰ ढक्कन
• ⇰ लिफाफा

• ⇰ थैला
• ⇰ एनवलप
• ⇰ लिफ़ाफ़ा

• ⇰ That which envelops, wraps up, encases, or surrounds; a wrapper; an inclosing cover; esp., the cover or wrapper of a document, as of a letter.
• ⇰ The nebulous covering of the head or nucleus of a comet; -- called also coma>.
• ⇰ A work of earth, in the form of a single parapet or of a small rampart. It is sometimes raised in the ditch and sometimes beyond it.
• ⇰ A curve or surface which is tangent to each member of a system of curves or surfaces, the form and position of the members of the system being allowed to vary according to some continuous law. Thus, any curve is the >envelope > of its tangents.
• ⇰ A set of limits for the performance capabilities of some type of machine, originally used to refer to aircraft; -- it is often described graphically as a two-dimensional graph of a function showing the maximum of one performance variable as a function of