(transitive) To surround or enclose.

Third-person singular simple present indicative form of envelop

(intransitive, idiomatic, originally aeronautics) To go beyond established limits; to pioneer.

(idiomatic) Approximate, rough, simplified, especially of a calculation, estimation or other reasoning.

plural of padded envelope

A large thick envelope, now usually coated with foam or bubblewrap, used to protect fragile items in the mail.

plural of kinematic envelope

plural of red envelope

(idiomatic, humorous, in hypothetical constructs) Any kind of event or activity that may contribute to one's self-promotion or visibility in society.

The area in which a robot, or any part of one, can move around.