1) the price for redeeming, ransom
1a) paid for slaves, captives
1b) for the ransom of life
2) to liberate many from misery and the penalty of their sins
Part of Speech: noun neuter
Citing in TDNT: 4:328 & 4:340, 543
From G3089; something to loosen with, that is, a redemption price (figuratively atonement): - ransom.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root λύτρον; click on the second column to search for that grammatical form of the root λύτρον; click on the third column to search for that word and grammatical form; click on the total to search for the root λύτρον.