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1. Choose and follow; as of theories, ideas, policies, strategies or plans
   "The candidate espouses Republican ideals"
   - adopt, follow
    
2. Take in marriage
   - marry, get married, wed, conjoin, hook up with, get hitched with, tie the knot, get hitched
    
3. Take up the cause, ideology, practice, method, of someone and use it as one's own
   - embrace, adopt, sweep up

Derived forms: espoused, espouses, espousing

See also: espousal

Type of: accept, choose, pick out, select, take, unify, unite