There are certain boundaries/limits between us.

[Anna232]

When talking about a certain boundary can I use either the singular or the plural form of "boundary"?

1. There are certain boundaries/limits between us.
2. There is a certain boundary /limit between us.

I used to according to #1.

boundary noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com

Definition of boundary noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

www.oxfordlearnersdictionaries.com

 

[teechar]

When talking about a certain boundary can I use either the singular or the plural form of "boundary"?

If it's just one boundary you have in mind, then use the singular ("boundary", not "limit").

I used to according to am talking about meaning #1 (of the word) in the link below.

boundary noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com

Definition of boundary noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

www.oxfordlearnersdictionaries.com

See above.