different between barrier vs tunneling

English

Etymology

From Middle English barryer, barrere, barry?er, from Old French barriere (compare French barrière), from Old French barre (“bar”).

Pronunciation

• (UK) IPA^(key): /?bæ?i.?(?)/
• (US, Mary–marry–merry distinction) IPA^(key): /?bæ?i.??/
• (US, Mary–marry–merry merger) IPA^(key): /?b??i.??/
• Rhymes: -æ?i?(?)

Noun

barrier (plural barriers)

1. A structure that bars passage.

   The bus went through a railway barrier and was hit by a train.

   The bomber had passed through one checkpoint before blowing himself up at a second barrier.

2. An obstacle or impediment.

   Even a small fee can be a barrier for some students.
3. A boundary or limit.

   Few marathon runners break the three-hour time barrier.

1. (grammar) A node (in government and binding theory) said to intervene between other nodes A and B if it is a potential governor for B, c-commands B, and does not c-command A.
2. (physiology) A separation between two areas of the body where specialized cells allow the entry of certain substances but prevent the entry of others.
3. (historical) The lists in a tournament.
4. (historical, in the plural) A martial exercise of the 15th and 16th centuries.

Synonyms

• See also Thesaurus:hindrance

Derived terms

Translations

Verb

barrier (third-person singular simple present barriers, present participle barriering, simple past and past participle barriered)

1. (transitive) To block or obstruct with a barrier.

   Synonym: bar

English

Alternative forms

• (UK) tunnelling

Noun

tunneling (countable and uncountable, plural tunnelings)

1. The act of burrowing a tunnel.
2. The practice of exploring tunnel.
3. (physics) The quantum mechanical passing of a particle through an energy barrier.
4. (finance) A type of fraud where assets and profits are transferred out of firms for the benefit of those who control them.
5. (computing, Microsoft Windows) A feature of the file system that allows files to preserve certain properties, such as creation date, even after being deleted and recreated.

Translations

Verb

tunneling

1. present participle of tunnel