Meaning of ABSTAIN in English
ab ‧ stain /əbˈsteɪn/ BrE AmE verb [intransitive]
[ Date: 1300-1400 ; Language: Old French ; Origin: abstenir , from Latin abstinere , from abs- 'away' + tenere 'to hold' ]
1 . to choose not to vote for or against something:
Six countries voted for the change, five voted against, and two abstained.
2 . to not do or have something you enjoy, especially alcohol or sex, usually for reasons of religion or health
Pilots must abstain from alcohol for 24 hours before flying.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012