Function and Echo

function

Mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function. ()
- synonyms: mathematical function, single-valued function, map, mapping
What something is used for.
- usage: "the function of an auger is to bore holes"; "ballet is beautiful but what use is it"
- synonyms: purpose, role, use
The actions and activities assigned to or required or expected of a person or group.
- usage: "the function of a teacher"; "the government must do its part"; "play its role"
- synonyms: office, part, role
A relation such that one thing is dependent on another.
- usage: "height is a function of age"; "price is a function of supply and demand"
A formal or official social gathering or ceremony.
- usage: "it was a black-tie function"
A vaguely specified social event.
- usage: "the party was quite an affair"; "an occasion arranged to honor the president"; "a seemingly endless round of social functions"
- synonyms: affair, occasion, social occasion, social function
A set sequence of steps, part of larger computer program.
- synonyms: routine, subroutine, subprogram, procedure

Perform as expected when applied.
- usage: "The washing machine won't go unless it's plugged in"; "Does this old car still run well"; "This old radio doesn't work anymore"
- synonyms: work, operate, go, run
Serve a purpose, role, or function.
- usage: "The tree stump serves as a table"; "The female students served as a control group"; "This table would serve very well"; "His freedom served him well"; "The table functions as a desk"
- synonyms: serve
Perform duties attached to a particular office or place or function.
- usage: "His wife officiated as his private secretary"
- synonyms: officiate

(v.i.) Alternative of Functionate.
(n.) The course of action which peculiarly pertains to any public officer in church or state; the activity appropriate to any business or profession.
(n.) A quantity so connected with another quantity, that if any alteration be made in the latter there will be a consequent alteration in the former. Each quantity is said to be a function of the other. Thus, the circumference of a circle is a function of the diameter. If x be a symbol to which different numerical values can be assigned, such expressions as x2, 3x, Log. x, and Sin. x, are all functions of x.
(n.) The act of executing or performing any duty, office or calling; per formance.
(n.) The appropriate action of any special organ or part of an animal or vegetable organism; as, the function of the heart or the limbs; the function of leaves, sap, roots, etc.; life is the sum of the functions of the various organs and parts of the body.
(n.) The natural or assigned action of any power or faculty, as of the soul or of the intellect; the exertion of an energy of some determinate kind.
(n.) A public or social ceremony or gathering; a festivity or entertainment, especially one somewhat formal.
(n.) A religious ceremony, especially one particularly impressive and elaborate.

Webster's Revised Unabridged Dictionary

echo

The repetition of a sound resulting from reflection of the sound waves.
- usage: "she could hear echoes of her own footsteps"
- synonyms: reverberation, sound reflection, replication
Greek mythology. ( a nymph who was spurned by Narcissus and pined away until only her voice remained)
A reply that repeats what has just been said.
A reflected television or radio or radar beam.
A close parallel of a feeling, idea, style, etc..
- usage: "his contention contains more than an echo of Rousseau"; "Napoleon III was an echo of the mighty Emperor but an infinitely better man"
An imitation or repetition.
- usage: "the flower arrangement was created as an echo of a client's still life"

To say again or imitate.
- usage: "followers echoing the cries of their leaders"
- synonyms: repeat
Ring or echo with sound.
- usage: "the hall resounded with laughter"
- synonyms: resound, ring, reverberate
Call to mind.
- usage: "His words echoed John F. Kennedy"
- synonyms: recall

(v.t.) To repeat with assent; to respond; to adopt.
(n.) Fig.: Sympathetic recognition; response; answer.
(n.) A nymph, the daughter of Air and Earth, who, for love of Narcissus, pined away until nothing was left of her but her voice.
(v.i.) To give an echo; to resound; to be sounded back; as, the hall echoed with acclamations.
(n.) A wood or mountain nymph, regarded as repeating, and causing the reverberation of them.
(v.t.) To send back (a sound); to repeat in sound; to reverberate.
(n.) A sound reflected from an opposing surface and repeated to the ear of a listener; repercussion of sound; repetition of a sound.
(n.) A signal, played in the same manner as a trump signal, made by a player who holds four or more trumps (or as played by some exactly three trumps) and whose partner has led trumps or signaled for trumps.
(n.) A signal showing the number held of a plain suit when a high card in that suit is led by one's partner.

Webster's Revised Unabridged Dictionary

Echo is either masculine or feminine given name

(Military) ECHO stands for European Community Humanitarian Aid Department

Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.