Being what was wanted or needed. used to greet someone in polite or friendly way. instance or manner of greeting someone. To greet someone who has just arrived.

To show something that was hidden before.

perhaps.

Group of homes built by government for poor people. To predict what will happen in the future.

in opposition to.

Spacecraft designed to carry a crew into space.

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

cylindrical projectile that can be propelled to great height or distance by combustion of its contents. Weapons shaped like a long tube carrying bombs. To travel, increase, or rise very quickly.

upright frames over which athletes jump. Small fence a person or horse jumps over in a race. To run and jump over something.

A first or preliminary version of a device or vehicle from which other forms are developed. make prototype of.

To make, or become, something better.

Having the desired effect or result.

relating to orbit or orbits. each of actual or potential patterns of electron density that may be formed in atom or molecule by one or more electrons.

series of short, high-pitched calls. give call consisting of repeated light tremulous sounds.

act of launching. Acts of firing rockets into the air. set boat in motion.