from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To interfere in a harmful manner: tried to tamper with the decedent's will; tampering with the timing mechanism of the safe.
- intransitive v. To tinker with rashly or foolishly: Don't tamper with my feelings.
- intransitive v. To engage in improper or secret dealings, as in an effort to influence: tamper with a jury. See Synonyms at interfere.
- transitive v. To alter improperly.
- n. A neutron reflector in an atomic bomb that also delays the expansion of the exploding material, making possible a longer-lasting, more energetic, and more efficient explosion.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A person or thing that tamps.
- n. A tool used to tamp down tobacco in a pipe.
- v. To alter by making unauthorized changes; to meddle.
- v. To discuss future contracts against league rules with a player.
from the GNU version of the Collaborative International Dictionary of English
- n. One who tamps; specifically, one who prepares for blasting, by filling the hole in which the charge is placed.
- n. An instrument used in tamping; a tamping iron.
- intransitive v. To meddle; to be busy; to try little experiments.
- intransitive v. To meddle so as to alter, injure, or vitiate a thing.
- intransitive v. To deal unfairly; to practice secretly; to use bribery.
from The Century Dictionary and Cyclopedia
- To experiment rashly; busy one's self unwisely or officiously; meddle: usually followed by with in this and the other senses.
- To interfere, as for the purpose of alteration; make objectionable or unauthorized changes (in): as, to tamper with a will or other document.
- To use secret or underhand measures; exert unfair or corrupt influence; especially, to use improper persuasions, solicitations, bribery, etc.
- n. One who tamps, or prepares for blasting by stopping the hole in which the charge is placed.
- n. An instrument used in tamping; a tamping-bar or tamping-iron.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. intrude in other people's affairs or business; interfere unwantedly
- n. a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.)
- v. play around with or alter or falsify, usually secretively or dishonestly
Probably alteration of temper.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle French temprer ("to temper, mix, meddle") (Wiktionary)