s, a, o, e, f, g, n, c, h, r, t, i are letters that make 'significant other'
ER, sign, AN, he, si, NT, IC, He, FICA, ant, SI, significant, other, ic, cant, can, CA, Ca, Er, Ni, Si, Th, Ig are words within 'significant other'
1 possible definitions for 'significant other'
Under this definition, significant other is a noun and has the following properties:
domestic partner, spousal equivalent, spouse equivalent have the same meaning as 'significant other'
'significant other' can be a type of mortal, individual, someone, person, somebody, soul.
lover, spouse, married person, better half, mate, partner are types of 'significant other'.