constrain meaning
EN
[-eɪn] 
US - VerbSGconstrainsPRconstrainingPT, PPconstrainedPREcon-SUF-ain
- (transitive) To force physically, by strong persuasion or pressurizing; to compel; to oblige.
- (transitive) To keep within close bounds; to confine.
- (transitive) To reduce a result in response to limited resources.
- (transitive) To force physically, by strong persuasion or pressurizing; to compel; to oblige.
- More Examples
- Used in the Middle of Sentence
- We show that the requirement of neuronal implementability of the inverse generative function strongly constrains the neuronal transfer function, essentially only allowing threshold-linear neurons.
- Used in the Middle of Sentence
Definition of constrain in English Dictionary
- Part-of-Speech Hierarchy
- Verbs
- Control verbs
- Transitive verbs
- Control verbs
- Verbs
- en constrained
- en constraint
- en constrains
- en constrainer
- en constraints
Source: Wiktionary
Grammatically, this word "constrain" is a verb, more specifically, a control verb and a transitive verb.