Definify.com
Webster 1913 Edition
Tamper
Tamp′er
,Noun.
 1. 
One who tamps; specifically, one who prepares for blasting, by filling the hole in which the charge is placed. 
2. 
An instrument used in tamping; a tamping iron. 
 Tam′per
,Verb.
 I.
 [
imp. & p. p. 
Tampered
; p. pr. & vb. n. 
Tampering
.] [A corruption of 
temper
.] 1. 
To meddle; to be busy; to try little experiments; 
as, to 
. tamper 
with a disease’T is dangerous 
tampering 
with a muse. Roscommon.
2. 
To meddle so as to alter, injure, or vitiate a thing. 
3. 
To deal unfairly; to practice secretly; to use bribery. 
Others 
For Fleetwood, Desborough, and Lambert.
tampered
For Fleetwood, Desborough, and Lambert.
Hudibras.
Webster 1828 Edition
Tamper
TAM'PER
,Verb.
I.
  1.
  To meddle; to have to do with without fitness or necessity. 'Tis dangerous tamp'ring with a muse.
2.
 To deal; to practice secretly. Others tamper'd
 For Fleetwood, Desborough and Lambert.
Definition 2025
tamper
tamper
English
Noun
tamper (plural tampers)
- A person or thing that tamps.
 - A tool used to tamp something down, such as tobacco in a pipe.
 - An envelope of neutron-reflecting material in a nuclear weapon, used to delay the expansion of the reacting material and thus produce a longer-lasting and more energetic explosion.
 
Translations
person or thing that tamps
  | 
pipe tool
  | 
Etymology 2
From Middle French temprer (“to temper, mix, meddle”)
Verb
tamper (third-person singular simple present tampers, present participle tampering, simple past and past participle tampered)
- (intransitive) To alter by making unauthorized changes; to meddle.
 - (in professional sports) To discuss future contracts against league rules with a player.
 
Translations
alter by making unauthorized changes
  | 
  | 
(sports) to discuss future contracts
